Expert Answers about Trailer Suspension

Trailer Suspension

Replacing a Double-Eye Leaf Spring that is 53 Inches Long on an Old Utility Trailer
Since you want to go to much shorter springs it will require welding on new hangers just so you are aware. The PR4B spring you reference can be used with many hanger kits. The one that is going to give you the most clearance is # APS4 at 5 inches. At this time we do not have u-bolt plates or u-bolts for a 3 inch square axle. If you already have these items and they are in good shape you could re-use them. The spring you currently have might be an automotive spring which means this might be a
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Single Slipper Spring for Tandem 6000 Pound Axles 2 Inches Wide
To determine the appropriate replacement slipper spring you would need there are a few measurements that are crucial. In order to get these measurements the current spring cannot have a load on it. If you have already removed the slipper spring from the trailer that works great. Or you can measure while it is on the trailer, just make sure that when you jack the trailer up you do so by the trailer frame. Also, make sure it is safe and secure before taking your measurements. The measurem
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Can a Rear Hanger that is Wider than the Trailer Frame be Still be Used
The reason that the hanger is wider is most likely because double-eye springs are 1-3/4 inches wide. But as long as the hangers you are using are welded to the bottom of the frame as much as they possibly can be it will be fine. Welding should be performed by a qualified professional welder.
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Are the Rubber Springs in the Timbren Axle-Less Suspension Systems Available Separately
The heavy duty hollow rubber springs in the Timbren Axle-Less suspension system # A12WS440 are going to last at least as long as traditional leaf springs. Since they are rubber and not steel they are more corrosion resistant and if properly maintained the system could outlast a traditional set up. There is no official mile or year count on the springs or system since there are so many variables to factor in (weather, load, area traveled in, storage, and so on). I spoke with my contact at Timb
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Replacement Boat Trailer Slipper Spring for a 1998 Calkins Boat Trailer
Based on what you have described and the measurements you have taken I do believe that slipper spring # C-4 is correct. The C-4 length is 26-1/4 inches so the mid-point length of your existing spring is on par with that. The old springs have probably stretched and worn enough to throw the exact measurement off a bit.
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What is the hanger Spacing for a Single Axle Trailer Using Double-Eye Leaf Spring # 1020
When using trailer leaf spring # 1020, the center to center distance from the front hanger to the rear hanger will be 20 inches. The most popular hanger kit for a single axle trailer is # APS1. I have included a picture showing the hanger kit measurements using the 1020 spring for you and a link to our FAQ on double-eye springs.
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Raising the Height of a Travel Trailer that Rides Close to the Ground
If the leaf spring stack on your travel trailer is currently mounted to the bottom of the axle, there is an over-under conversion kit that you could use to gain a few more inches of height. However, this will change the center of gravity on the trailer and can lead to an increased chance of trailer sway. For 3 inch round axles you could use # K71-385-00. And for 2-3/8 inch round axles use # K71-384-00. You should not have to do any welding to use these kits. You would not want to flip the
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Should Trailer Suspension Equalizer be Tilted on a Tandem Axle Trailer
First, thank you for the kind words. We do work very hard to help as best we can. Regarding your tilted equalizer ideally you want it to be level unless the suspension is traveling (moving) do to an unlevel surface. Having too much of the trailer weight forward or rearward might cause this issue as could having the wrong size suspension components. But if everything is correct as far as the replacement parts you purchased then sometimes you just need to persuade the equalizer to go back to level
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Replacing Trailer Suspension on an 8,000 Pound Capacity Boat Trailer
Do you have slipper springs like # WIC2 or double-eye springs like # PR626? If the springs are 2 inches wide then they are more likely to be slipper springs. Double-eye springs are 1-3/4 inches wide. Double-eye spring # PR626 is 26 inches long eye to eye. Hanger kit # APT1 is one likely candidate if you have double-eye springs. It is the only kit with straight equalizers. I have included links to our FAQ articles on trailer suspension for you.
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Does Using a Single Leaf Double-Eye Trailer Spring Allow for a Smoother Ride
If the other spring has the same capacity as # TE30, rated for 3,000 pounds, then you will not experience any difference in ride quality. One thing to consider is if the springs are mounted on top of the axle, going to a single leaf spring like TE30 will cause the deck of the trailer to sit lower. I have included a link to our FAQ article on double-eye trailer suspension for you.
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Fit of Dexter # K71-652-00 E-Z Flex Suspension Equalizer as Replacement for 13-104-02
The Dexter Heavy Duty 5-5/8 Rubber Suspension Equalizer, part # K71-652-00, is the specified replacement part for the standard 13-104 equalizer for tandem axle trailers. This is intended for use with axles rated for up to 6000 lbs. The only other tandem axle kit offered, part # K71-653-00, has a 7-3/4 inch equalizer and replaces part # 13-122 for 8000-lb axles. Axle spacing on your trailer will be a function of several things: the equalizers, the shackle and the springs. The minor variance yo
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Can Double Eye Springs be Replaced with Slipper Springs on a 1969 Shoreline Boat Trailer
In most cases switching from double eye to slipper spring requires new hangers and mounting hardware. This would require you to cut the old spring hangers off the trailer and mount the new hangers in the correct location for the slipper springs. Due to the extra welding involved, I suggest you stay with your original suspension set-up. To select the correct springs you need the weight capacity of each axle. Then you need to measure the dimension from center of eye to center of eye on your do
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In What Orientation are Trailer Suspension Hangers Installed
Based on the picture you submitted you would want to rotate the hanger that is in your hand 90 degrees clockwise and weld the flat portion with the 2 holes in it to the bottom of your trailer frame. So yes, you are correct in how you thought it should be welded on. I attached an FAQ article on trailer suspension for you to check out.
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Hanger Location Recommendations for Use with a Leaf Spring # PR3
The Trailer Leaf Spring, 2250 lbs. 6 Leaf, item # PR626, is sold as a replacement spring for older trailers and measures 26 inches for eye to eye, center to center. If you are replacing the springs and hangers you will need to use the same center to center dimension as the original mounting brackets. These springs are designed for a 4,500 pound axle. Since you have a distance of 23-1/2 inches from eye to eye and your axles are 3,500 lbs this would not be the spring for you. It sounds like
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How to Determine the Right Replacement Springs for a Boat Trailer
You will need to measure the springs currently on the trailer to get the correct ones. You will also need to know the axle capacity which should be listed on a sticker or plate on the trailer frame or tongue. You most likely have de-rated 3,500 pound axles but that sticker or plate should tell you. To measure you will first need to take the weight off of the side you are going to measure by jacking up the trailer on that side. Then you will take the measurements indicated in the picture I hav
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How to Determine the Correct Replacement Double-Eye Trailer Leaf Springs
You will need to measure the springs currently on the trailer to get the correct ones. You will also need to know the axle capacity which should be listed on a sticker or plate on the trailer frame or tongue. To measure you will first need to take the weight off of the side you are going to measure by jacking up the trailer on that side. Then you will take the measurements indicated in the picture I have included. Based on the measurements and the capacity needed I can determine if there are
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Timbren Trailer Suspension Enhancement Options
It sounds like you may need to look into the state of the suspension on your trailer. If there is so much movement that it has caused the tires to damage the fenders then something is not quite right. The Timbren springs like # TTRA1702 are designed to be installed on a trailer that has a suspension system that is in good working order so making sure yours is good would be the first step. I have included a link to the installation instructions for you to view. These springs are 2-3/4 inches
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Can Timbren Axle-Less Suspension System Fit on a Single Axle Trailer to make a Tandem Axle Trailer
You can add the Timbren Axle-Less Suspension System, # ASR1200S01, to your trailer in combination with your current axle, but there are a few factors that you will want to consider first. To add this system to your trailer, you will need to move your current axle either forward or backward to ensure that the weight of the trailer and any load is distributed to both axles properly. I have attached a diagram that explains how to find the correct axle spacing for a tandem axle trailer to ensure
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How to Determine the Distance for Mounting Trailer Spring Hangers on a Single Axle Trailer
Spring Hanger location dimensions are normally figured by the manufacturer and provided with the spring hanger kit, that includes all of the parts for installing the springs on the trailer frame. I have provided a chart that shows the spring hanger locations for single axle trailers for you to review, see link. There are two considerations for mounting the spring hangers. First, the distance between the spring hangers as you have asked about. Second, the location of the axle when installed on
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Will Changing Leaf Springs Help Unloaded Ride Quality of a Trailer
The problem is that in order for the trailer to have the overall capacity it needs to carry what the trailer is rated for it needs to have a very stiff spring. The trade-off is that when the trailer is loaded the springs are working fine, but when the trailer is unloaded it can be pretty annoying. If you were to go with a spring that is light enough so that the trailer would not bounce around as much the trailer would also no longer have the capacity it once did. So basically you have to a
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Are the 3-Leaf Double-Eye Springs # 1020 Sold Individually or in Pairs
The 3-Leaf Double-Eye Spring # 1020 that you referenced is sold individually. So if you needed 2 springs for one axle you would need to order a quantity of 2. I attached a review video for this product for you to check out also.
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Options for Installing CE Smith Front Hanger Bracket on a Trailer with a Boxed Frame
The best way that I could thing of would be to drill access holes and then fishwire carriage bolts through the access hole and the opening of the frame. Check out the FAQ article I attached doing this to install hitches. Its a different application, but its the concept I am talking about. It would be up to you to determine if this method would be possible for your trailer.
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Hub/Drum Assembly Recommendation with a 6 on 5-1/2 inch Bolt Pattern for a Timbren Axle-Less System
Yes we do, you would want the Trailer Hub and Drum Assembly # 84656uc3. This hub and drum has a 6 on 5-1/2 inch bolt pattern and uses the exact same bearings that the Timbren Heavy-Duty Axle-Less Trailer Suspension # ASR2KHDS03 is compatible with so it should work perfectly for you. The # ASR2KHDS03 lists its spindle/hub compatibility as being designed for L68149 inner bearings and L44649 outer bearings, which is exactly what the # 84656uc3 comes with.
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Is Timbren Axle-Less Suspension System A20RS545 Better for Boat Trailers than Traditional Systems
In a marine application, a Timbren axle-less trailer suspension system like part # A20RS545 would likely outlast a traditional suspension system just due to the fact that there are fewer steel components to rust out. On top of that, the steel on the # A20RS545 is powder coated and will hold up longer than standard suspension components. Another benefit would be that you are losing the axle entirely which would give you better ground clearance.
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Attaching Shackle Bolts and Spring Hangers to Utility Trailer
It makes no difference which direction the shackle nut or bolt head is facing. The bolt is not driven in, when the shackle bolts are tightened, the knurled portion of the bolt will be drawn into place. Make sure you use a lock nut, and snug it down then back it off about 1/4 turn so the shackles will not bind. If you use a wet shackle bolt with a grease zerk, you will want the zerk facing the outboard side of the trailer for easy access. The movement of the suspension will make it almost impo
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Torque Rating Requirements for Installing Leaf Springs on a 7000 lb Tandem Axle Trailer
The torque requirements for leaf spring u-bolts depend on the diameter of the u-bolts that are being used. If the gross weight of your tandem axle trailer is 7,000 lbs, then you likely have two 3,500 lb axles. Typically 1/2 inch diameter u-bolts are used with leaf springs for 3,500 lb axles and they have a torque rating of 45 ft/lbs to 70 ft/lbs. The shackle bolts do not require a specific torque rating because tightening the shackle bolts too much will squeeze the shackle straps against the
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Can Shackle Straps Be Used at the Front and Back of a Leaf Spring
Usually, you do not put shackle straps on the the front and back. One end the the spring should be suspended from a hanger. The reason that shackle straps are needed is to compensate for the extra drop of something like an equalizer or shorter hanger and to allow the spring to have the proper range of motion it requires. To use shackle straps in both places you would have to have hangers of different height. I have included a link to our FAQ article on double-eye trailer suspension that cover
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Wall Thickness Recommendation for Square Tubing Support For Timbren Axle-Less Suspension
If I were installing the Timbren Axle-Less Suspension System, # A12WS545, on my trailer, I would use a 2 inch steel tubing with a wall thickness of 1/4 inch. I spoke with my contact at Timbren and he told me that they do not have a minimum thickness that they require as long as it was a 2 inch steel square tube. It is recommended that you add this tube if your trailer does not have a crossmember above the suspension and 1/4 inch is a common wall thickness for a 2 inch square axle.
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Rear of 26-Foot Forest River Trailer Drags When Driven Over Bumpy Road Surfaces
Your 26-foot Forest River Travel Trailer leaf springs may need replacing if you find you have limited ground clearance at the rear of the trailer when driving over bumpy road surfaces. Since I do not know what year, series or model of Forest River trailer you have I can offer some general guidance. I have also included links to two articles on trailer suspensions that you might find helpful. If your truck/trailer combination results in the trailer frame being out of level when hitched (tilted
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Will the E-Z Flex Equalizers # K71-652-00 Fit on a 2006 Laredo 29RK With 5000 lb Tandem Axles
The E-Z Flex Suspension Kit, # K71-652-00, will work on trailers that have axles rated up to 6,000 lbs each. Your 5,000 lb axles fall within the capacity of these equalizers so the weight would not be an issue. These equalizers are also compatible with your 1-3/4 inch leaf springs, but you will want to make sure they are a compatible replacement for your current equalizers. The E-Z Flex equalizers were designed to replace the standard Dexter equalizers # 13-104. This number should be stamped
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Triple-Axle Trailer Hanger Kit Recommendation for 7K Axles
The Triple-Axle Trailer Hanger Kit # APTT3 that you referenced is designed to work on axles with capacities of 2,000 lbs to 7,000 lbs so it should work very well for you. I attached a picture that has a chart that shows exactly how you should space the axles when used with a 6-leaf spring like a # PR6. From the outer hangers to the inner hanger you will need 24-3/4 inches, in between the two center hangers you will need 29 inches.
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What is the Outer Diameter of the Bushing Used in the 4-Leaf Double-Eye Spring # PR4B
The outer diameter of the bushing that comes with the 4-Leaf Double-Eye Spring # PR4B is 11/16 of an inch. For a replacement bushing for the # PR4B you would want a Nylon Bushing # TRBU11566. I attached a link to all the bushings we offer also.
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Installation of Timbren Axle-Less Trailer Suspension on Trailer Pulled by Jeep Liberty
The Timbren Axle-Less Trailer Suspension # A4RS440 you referenced will need to be mounted on your trailer with the rebound springs in front of the spindle. I have provided a graphic displaying the proper set up. The installation of this product is fairly easy and can be bolted or welded to your trailers frame. It has a weight capacity of 400 lbs, works with # L44649 inner/outer bearings and # L44610 inner/outer races, and comes with a 3-year limited warranty.
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How to Determine where to Place Axles on a 17 Foot Car Trailer or Any Trailer
Placement of the axles depends on several factors and there is a formula that you can follow to determine the best placement of the axles. Take a look at the picture I have included which explains how to determine where axles should be placed. Once you have the axle locations determined you can look at what hanger kit will work best for you. I have included a link to the options for you.
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What Is the Mounting Hole Diameter on the CE Smith Front Hanger Bracket # CE14016G
The top mounting holes on the CE Smith Front Hanger Bracket # CE14016G are as follows: The 2 top holes on the ends are 7/16 inches in diameter The center top hole is 1/2 inch in diameter The lower spring eye holes are 9/16 inch diameter I have included a picture showing these measurements for you.
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Torque Rating For Shackle Bolts and Which Way Should a Lock Nut Go On a Bolt
For the 9/16 inch diameter bolts a torque rating of 65 to 95 foot pounds is right where you want to be. Lock nuts will only thread on properly one way so it is fairly easy to determine if you have it on correctly when you start to turn it by hand. On a nut like # TRFA916DLNZ there are markings on it as you can see in the picture. Other lock nuts are wider on the end that goes onto the bolt so it is clear on those as well.
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Could the Bushing of the WIE3 Slipper Spring be Replaced with one for a 1/2 Diameter Bolt
I spoke with my contact at Redline and he informed me that you could use a bushing with a 1/2 inch diameter with the 3-Leaf Slipper Spring # WIE3. For the smaller bushing you could get a Nylon Bushing # TRBU11506.
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Weight Capacity of Timbren Axle-Less Suspension System # A20RS545
Each unit (right and left side of trailer) is designed to replace one 2000 lb axle. This means that the total weight applied to the axle-less system (trailer weight plus the weight of the load carried in the trailer) cannot exceed 2000 lbs. Timbren makes axle-less systems designed to replace up to a 3,500 lb axle. You can see other systems we offer by clicking the provided link.
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How to Determine Correct Leaf Spring Size on 6 X 12 Utility Trailer
When replacing the leaf springs on your 6 x 12 utility trailer you will need to match all of the dimensions and the spring capacity as closely as possible to the original spring. Usually the measurement from eye to eye will lengthen and the height measurement will decrease with wear. See picture I have included that will show the measurements you will need to match to replace your leaf springs. The number of leaves in a spring pack does not have to remain the same as long as the weight capaci
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How Much Clearance is Needed Between Trailer Axle and Trailer Frame
Since your axle is mounted on top of the leaf spring you will want between 2 and 2-1/2 inches between the top of the axle and the trailer frame. You will also want 3 inches of clearance between the top of the tire and the fender. Check out the FAQ article on trailer suspension I attached also.
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How to Improve a Rough and Bumpy Ride on a 2,000 Pound Fruefoff Trailer
I do have some suggestions. First off, make sure that the tongue weight is not too heavy or light. Typically tongue weight should be 10 to 15 percent of the gross trailer weight. A tongue weight that is too heavy would cause the rear end of the trailer to be more bouncy. Getting the trailer loaded properly will be the first thing you can do. As far as aftermarket suspension enhancement using a system like # TTRA1702 would help but it is only rated for 1,000 pounds for the set. All the other s
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Total Suspension Travel or Deflection on Timbren Axle-Less Trailer Suspension System # A4RS440
I spoke with my contact at Timbren and he said on the Timbren Axle-Less Trailer Suspension System, part # A4RS440, that it has 1-inch of deflection or suspension travel. See attached photo. He also said to remember that unlike leaf spring suspensions, the Axle-Less suspension units operate independently of one another, so each spring only activates when needed.
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Correct Spring Position on a Dual Axle Boat Trailer with Slipper Springs
You will want to get it set up correctly because there could be some problems down the road. You may not have to turn the axle around but you will definitely want to make it so the front spring slipper is pointed towards the rear. I have included a picture for reference. You will need to make sure that the front hangers are the proper height once the springs are turned around to allow for the correct amount of travel. You want the distance from the top of the axle to the bottom of the trailer
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Dimensions of Redline Rear Hanger with Bushing for Single Axle Trailer Suspensions # 30-20
The dimensions of Redline Rear Hanger with Bushing for Single Axle Trailer Suspensions # 30-20 are 2-1/8 inches long, 1-3/4 inches wide, and 3/16 inches thick. I have provided a video and a graphic that shows these dimensions as well. I am also provided a page displaying the shackle links needed for use with this spring hanger and your 1-3/4 inch wide double-eye springs.
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Raising Height of 5th Wheel Suspension to Provide Proper Clearance Between Bed Rails and Trailer
There are a few things you can try to get the proper 6 inch clearance between the top of the bed sides and the bottom of the fifth wheel trailer loft. One or more of these suggestions might be required to achieve the proper clearance. If your truck is lifted or has larger than stock wheels/tires, returning the truck to stock ride height will solve the problem in most cases. Adjusting the fifth wheel hitch so that it is at its highest level and moving the pin box so that it is at its lowest
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How to Gain Ground Clearance for a Travel Trailer that Hits the Driveway When Entering or Leaving
There are a couple different ways to raise the ride height of your trailer, but before we choose the best option for you, we will want to take a look at a few things. First, it sounds like you are not towing with your trailer level so you do not hit your ball mount on the driveway. A trailer that is not level can create many problems such as ground clearance and trailer sway. If you have any sway control issues with your trailer, then I would recommend moving your leaf springs above your axl
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What is the Spindle Length Where the Hub Fits on the Timbren Axle-Less Trailer Suspension System
The spindle that is used on the Timbren Axle-Less suspension system, # ASR1200S02, is spindle # R104BTREZ. I took some measurements of the spindle. From the inner bearing stop to the threaded portion is 3-5/16 inches. To the end of the threads it is 4-3/16 inches. And to the end of the zerk fitting it is 4-1/2 inches. I made a video that explains where exactly I measured.
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Will a Flat Trailer Slipper Spring Fit in Place of a Slipper Spring with a Hook End
It sounds like you have a slipper spring like # WID2 just with a different design. Unless the rear hanger requires the hook design then you can use WID2. You do not want to remove any leaves. Doing so does not half the capacity of the spring, it will make the capacity unknown and can compromise the structural integrity of the spring. When taking measurements of the spring, make sure you are doing so with the weight off of the spring. To do this you just need to jack up one side of the trailer
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Any Leaf Springs Designed for Boat Trailers Used in Salt Water
They do not have leaf springs that are specifically designed for boat trailers that are used in salt water. Since the leaf springs will flex there is no kind of plating or coating that will stay attached to the spring. Also, the process that is used to plate or coat a part can use high temperatures that could cause premature failure of the spring. As long as you get the leaf springs with the correct weight rating and the correct measurements to fit your boat trailer you should have no problem
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Can Springs Be Upgraded on 5th Wheel Trailer With 5,200-Lb Axles
You may go up to a higher weight capacity spring as long as the eye-to-eye length and the width will fit, but the higher capacity springs WILL NOT increase the weight capacity of your trailer. The weight capacity will still be limited to whatever the lowest rated component of the system is, whether it be the axle, the shackles or the equalizer. If you decide to go with the higher-rated springs, you will be making the axle and the spindles the lowest-rated component, which can cause failure of th
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Triple Axle 5th Wheel Trailer Has Center Axle Forward and Backward Movement
Some movement is normal. This is because there are two pivot points, one at the second hanger and one at the third hanger which are on either side of the center axle. What you will want to do is check several things to determine if there is wear that is causing excessive movement. Check the shackle straps, equalizers, and hangers to see if the holes have elongated. If so they will need to be replaced. Also make sure the u-bolts are tight and in the correct position and that the nub on the spr
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Timbren Axle-Less Trailer Suspension System Recommendation for a 1977 13 ft Scamp Trailer
Converting a torsion axle trailer to a trailer with a Timbren Axle-Less Trailer Suspension System has been done before and most people who have done this really prefer the smoother ride and increased ground clearance. Timbren Axle-Less trailer suspension system is a great alternative to torsion axles. While both systems allow either side of the trailer's suspension to operate independently, only Axle-Less suspensions are actually separate units. Torsion axles still require a bar that spans t
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Will Using Longer Suspension Hangers Make a Trailer Ride Higher
The hanger length can affect the trailer height. You would need to change the height of all the hangers equally to keep the geometry of the trailer the same. But at the end of the day there are other ways to get more height on a trailer. Keep in mind that increasing trailer height changes the center of gravity on the trailer and can also change the tongue weight and lead to sway problems. If the springs on your trailer are currently mounted under the axle, you can use an over-under conversion ki
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How to Fix Shackle Straps that Hang from the Equalizer to Spring and are Pointed Down
What you can do is jack up the trailer and then use a long metal bar or piece of wood and pry the spring back up into position. Some times you may also need to jack up under the axle and that might help to pop it back into place. This can happen with no weight on the trailer and if weight is pulling down on it. For example if the trailer was jacked up and the axle was pulling down it can pop it out of position.
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Availability of a Leaf Spring with a 25-1/4 inch Length
We carry several different double eye leaf springs with a 25-1/4 inch distance between the center of the bushings. Here they are with their corresponding axle capacities: # PR722 for 2,500 lb axles # PR3 for 3,500 lb axles # PR4B for 3,500 lb axles # PR4 for 4,800 lb axles # PR5 for 5,800 lb axles The # 2-1020 that you referenced is the only kit we sell right now that comes with U-bolts and U-bolt plates, but we do sell U-bolts and plates that will fit the above mentioned springs, but
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E-Z Flex Heavy Duty Rubber Suspension System for a KZ Durango 285RL 5th Wheel Trailer
We have 4 E-Z Flex suspension systems and all have wet bolts with zerk fittings for lubrication. There are 2 tandem axle applications and 2 triple axle applications. For tandem axles we have kit # K71-652-00 with 5-5/8 inch long equalizers and 6k capacity. It is designed for an axle spacing of 33 inches. We also have kit # K71-653-00 with 7-3/4 inch long equalizers and 8k capacity. It is designed for an axle spacing of 35 inches. For triple axles we have # K71-656-00 with 5-5/8 inch long e
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Replacement Trailer Leaf Springs for a 1999 Thor Skamper Vision Pop-up Camper Model 23L
Provided that you are measuring your current springs with the weight off of them (spring removed or trailer jacked up on one side) then spring # PR722 would be the proper replacement. Each spring has a capacity of 1,250 pounds so 2 of them will have a 2,500 pound capacity and would work with a 2,100 pound axle. We do have shackle bolts. There is a steel shackle bolt, 3 inches long, 9/16 inch diameter, # 166081. We also have steel wet shackle bolt # 126B2 that is the same length and diameter.
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Will E-Z Flex Triple Axle Suspension Kit Fit a 2002 Alfa Toyhouse Triple Axel Trailer
The E-Z Flex suspension kit # K71-657-00 is designed to replace triple axle systems that have 7-3/4 inch long equalizers. Measure the equalizer length on your current set up (from the center of one eye to the center of the other eye) to determine if this kit will fit your trailer. There are 3 different hanger kits associated with the PR6 spring and triple axle trailers. Two of them have 7-3/4 inch long equalizers and one uses 8 inch long equalizers so there is a good chance that K71-657-00.
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How to Tow a Horse Trailer Level with a 2012 Ford F-450 with a 4 Inch Lift
There is actually an easier solution to this problem then lifting the trailer. If you were to lift the trailer it would change the center of gravity and lead to a greater possibility of trailer sway. It can also affect ride quality and tire and suspension wear. Instead the safest solution is to use a ball mount with the proper drop so you can tow the trailer level. To determine the correct drop needed park the truck and trailer on level ground. Then measure from the ground to the top of the
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Electric Brake Hub/Drum Included with Timbren Axle-Less Suspension System # A35RS545E
The Timbren Axle-Less Suspension System you referred to, part # A35RS545E includes the following: Aeon Spring Assemblies EZ Lube Spindle Assemblies Castle Nuts and Washers for Spindles Inner and Outer Bearings Inner and Outer Races Grease Seals EZ Lube Grease Caps 5 Lug on 4-1/2 Bolt Circle Brake Drum Electric Brake Assemblies I have taken a photo from the product description page that shows everything that is included.
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Should Trailer Suspension be Torqued Down with the Trailer Loaded or Unloaded
Since you would be installing the suspension with the trailer unloaded and jacked up, the torque specs are assuming the trailer is not loaded. Technically I suppose it would not matter since the spec is for the hardware and is not taking into account whether or not the trailer is loaded. But it would be a lot easier to do if it was unloaded (more space).
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Building a Trailer to Replace a 1997 Chariot Marine Custom Built Boat Trailer
The number of leaves in a spring is not really relevant to a springs capacity. there are single leaf springs that have a higher capacity than a 4 or 5 leaf spring. It depends on the design and thickness of the steel along with other factors that determine the capacity. Having a higher capacity spring would not increase the capacity of the trailer because the axle rating is set in stone and you always go by the lowest rated component in the system. Since the axles are rated for 4,100 pounds ea
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Should Suspension Shackle Straps Angle Towards the Front or Rear of a Trailer
The distance between the spring eyes on center for # PR4B is 25-1/4 inches. When using hanger kit # APS5 the distance on center between the hangers with this spring is 25-3/4 inches, a 1/2 inch longer. This is correct. The hanger spacing should be longer and the bottom of the shackle strap should angle towards the front. Once there is weight on the suspension the angle of the shackle will change.
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Slipper Spring Recommendation for a 1983 Dilly Trailer
The 2-Leaf Slipper Spring # WIC2 that you referenced should work well for you. Springs will stretch over time so it may seem like the # WIC2 would be too short, but it is actually perfect since its length. Did you measure the length of the springs when they were on the trailer, or when the springs were removed?
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What is the Total Weight Capacity for the Timbren Axle-Less Trailer Suspension System # ASR1200S01
The 1,200 pound capacity listed for the Timbren Axle-Less Trailer Suspension System, # ASR1200S01, is for the pair. If you need a higher or lower capacity system we carry numerous options. I have included a link to the options for you to view.
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Torque Ratings of U Bolt Nuts with 3/8 diameter
I called the manufacturer and they said that the minimum torque is 45 ft. lbs. and the maximum is 70 ft. lbs for the Redline Trailer U-Bolts # SP01-020.
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Hanger Spacing Recommendations for a Triple Axle Trailer with 25-1/4 inch Springs
I did some checking and it looks like on springs that are 25-1/4 inches in length measured from eye to eye you will want the distance from the first hanger to the second to be 29-1/2 inches, from the second hanger to the third you will need it to measure 34 inches and from the third to the fourth 29-1/2 inches. This measurement is from center to center of the hangers. Check out the pictures I attached that show
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Can Trailer Suspension Hangers Be Bolted on
You will want to weld the hangers of the Single-Axle Trailer Hanger Kit # APS1. The holes you see are not designed to have bolts run through them. If you did run bolts they would most likely interfere with the spring and how it would sit on the hanger. I would recommend you have a qualified welder do this for you. Check out the FAQ on trailer suspension I attached also.
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Replacing Leaf Spring Recommendation for a 2004 Weekend Warrior Super Lite FK 2100
Since you have dual axles you will split the overall capacity of your trailer between the two axles. So you would not want a double eye leaf spring set for 8,000 lbs even if we made one because that would be way overkill for your setup. The closest spring sets that we offer would be the 4-Leaf Double-Eye Spring # PR4. This spring has an axle capacity of 4,800 lbs, so when you double that because of your dual axle setup you end up with a capacity of 9,600 lbs which is more than the 8,000 lb ra
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What is the Torque Rating for 1/2 Inch U-Bolts for Leaf Spring Trailer Suspension
The torque rating for 1/2 inch u-bolts in U-Bolt Kit, # APUBR-1, is a minimum of 45 ft lbs and a maximum of 70 ft lbs.
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How Long is the Threaded Part of Round Trailer U-Bolts # SP01-040
I went out to the warehouse and pulled a set of the u-bolts, # SP01-040, to measure the threaded portion. The threaded portion is approximately 2 inches long.
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What Should the Hanger Spacing be for 1020 Leaf Springs and Hanger Kit APS4
We have a handy chart on the product page that will show you the distance you will want the front and rear hangers to be when using kit # APS4. When using # 1020 springs the distance from the center of the front hanger to the center of the back hanger will need to be 20 inches.
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Is there a Specific Torque Rating for Trailer Suspension Bolts
If we are talking about shackle bolts that hold the leaf springs to the hangers then they do not have to be super tight if you use a lock nut. You will be looking at about 65 to 95 foot pounds of torque. That is for 9/16 inch bolts. Here is a short chart for common suspension bolt sizes: 1/2 inch Bolts: 45 ft/lbs - 70 ft/lbs 9/16 inch Bolts: 65 ft/lbs - 95 ft/lbs 5/8 inch Bolts: 100 ft/lbs - 120 ft/lbs This comes from our FAQs on slipper springs and double-eye springs which I have linke
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Is the Timbren Axle-Less Trailer Suspension System a Good Choice for a Motorcycle Trailer
The Timbren suspension system, like # A20RS440, is designed to be toe-in when there is no load on it. So when the load is placed on it it will push the tire out so that it is riding straight on the ground. Provided the trailer is not overloaded and the tires are trailer tires and inflated to the maximum psi as indicated on the tire, then you should not see excessive wear and get more than just a few thousand miles out of a set. A regular axle has a bow in it. That bow should be pointed up and
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Raising Suspension of 2008 Keystone Outback 25RSS
The Dexter E-Z Flex Heavy Duty Rubber Suspension System you referenced, part # K71-652-00 replaces your existing equalizer like part # TREQ104. The rubber spring will isolate road shock and improve the ride of your trailer, but it will not raise the height of your trailer. If your leaf springs are currently connected to the underside of your axle, you can use an Over-Under Conversion Kit like part # K71-384-00 for a 2-3/8 inch diameter axle or # K71-385-00 for a 3 inch diameter axle to swap t
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Will 2-1/2 Inch U-Bolts Fit a 6,000-Lb Hammerblow Axle On a Homebuilt Trailer
The U-bolts on a trailer suspension are designed to attach the leaf springs to the axle of the trailer. The U-bolts will need to fit the diameter of your axle. I would recommend to measure the diameter of the axle. A 6,000-lb axle should have a diameter of 3 inches. The spindle that is attached to the axle will measure 2-1/4 inches in diameter. There is not a U-bolt available in a width of 2-1/4 inches. The Redline Replacement U-Bolt, part # 176500, is a U-bolt that is designed for 5,200-lb
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Which Bronze Bushing Fits in Double-Eye Trailer Leaf Spring # PR5
To replace the bushings that are in double-eye spring # PR5 you will need one that is 1-3/4 inches long with a 9/16 inch inner diameter and 11/16 outer diameter like # D014-077-00 for 1. Or for a 4 pack use # K71-291-00.
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Amount of Spring Deflection of Timbren Alxe-Less Suspension # A20RS440
You are correct, the Aeon spring does indeed function as a dampener, and should not need additional dampening. Each unit is rated at a 1000 lb capacity, so two sets or four units would provide a 4000 lb capacity. The 2-5/8 inch dimension shown is the static position, but this exact dimension will depend on the construction of your trailer and how heavy it is. The engineering folks at Timbren tell me that the springs are capable of 2-1/2 inches of travel or deflection.
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Hanger Spacing for Tandem-Axle Hanger Kit for Double-Eye Leaf Springs # APT4
I contacted my buddy at Redneck Trailer Supply, who is my go-to guy for trailer suspensions, who told me that the front, center and rear hanger center hole to center hole dimension should be 24-3/4 inches, as shown in the diagram I edited for you.
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Does the Shackle Angle have to be the Same Angle on both Sides of my Trailer Suspension
Most likely you are fine and the difference in angle is due to the trailer sitting higher on one side than the other. I would still verify that the spring hangers are the same distance apart on both sides of the trailer, and that none of the other trailer components are not worn out. For the 3-Leaf Spring # PR3 that you referenced the recommended distance between the hangers is 25-3/4 inches
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Is there a Centering Stud on Both Sides of the Redline Slipper Spring # WIC2
I pulled a 2-Leaf Slipper Spring # WIC2 from our warehouse and found that it has a mounting stud on both sides of the slipper spring. Check out the video I attached that shows both sides of the spring.
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What is the Minimum Safe Distance Between Tires on a Tandem Axle Trailer
The general consensus here at etrailer is that the minimum safe distance between tires on the same side of a tandem axle trailer is 4 inches. Technically speaking, you will need a minimum of 1 inch between the tires with the suspension in full flex which is when the tires will be the closest together. There are several things to consider when going to larger tires. First, some folks think that using larger tires will allow them to carry more weight. But you still are limited by the capacity o
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Should I Replace the U-bolts When Replacing the Leaf Springs
I would not recommend reusing your existing u-bolts because the nuts are designed to mis-align the threads as they are tightened down to prevent the u-bolts from coming loose. You should choose the u-bolt kit that will fit the diameter of your axle. The u-bolt kit # APUBR-1 that you referenced is designed for one 3,500 lb trailer axle with a diameter of 2-3/8 inches. The kit includes 4 u-bolts, 2 u-bolt plates and 8 hex nuts 1/2 inch.
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How to Prevent Trailer Sway on a 26 ft 2011 Starcraft Autumn Ridge Towed by a 2011 F-150 Ecoboost
Many times adjusting the way that the trailer is loaded can help minimize trailer sway. Try loading the trailer so that more weight is toward the front of the trailer, and see if this helps. Too much weight in the back of the trailer and a light tongue weight will cause the trailer to sway. You will also want to make sure that your trailer is as close to level as possible. If your trailer is loaded properly and you are towing it level, then I would recommend is adding a weight distribution sy
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How To Determine Weight Capacity of Double Eye Leaf Springs on Trailer
The best way to determine the weight capacity of your leaf springs would be to check the weight rating of the axle on your trailer. The trailer will have a plate or sticker on it that will list the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that will list the weight capacity. You can also tell the weight capacity of the axle by measuring the diameter of the axle. A 2,000-lb axle will have an axle di
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Leaf Spring Recommendation for a 2007 Load-Runner Tandem Axle Cargo Trailer w/ 4,900 lb Capacity
Since your trailer is a tandem axle trailer the carrying capacity of it will be split between the two axles. So you will need 3,500 lb axles springs. The 3-leaf Double Eye Spring # PR3 is what I would recommend you get for your trailer. Since it is always a good idea to replace springs in pairs I would recommend you get two of these springs and replace both springs on the axle. You will want to make sure that the distance between your spring hangers is 25-1/4 inches apart on center. If this d
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What is the Correct Distance Between the Spring Hangers When Using a PR722 Leaf Spring
The distance of 25-5/8 inches would be the correct distance to have between the spring hangers. You have to consider that as the the leaf spring compresses from the weight of the trailer it will flatten out and the overall length of the spring will increase so that the shackle will face the right direction.
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How to Determine the Capacity of Trailer Leaf Springs and How to Raise the Coupler Height
Leaf springs typically have the part # stamped on the strap that holds the leafs together at one end of the shorter leafs, or it is painted on the concave side of the springs. The part number can then be used to determine the capacity of the springs. Generally springs with any age on them will be very hard to get a part number off of. You would then need to go by the axle capacity to determine the spring capacity, which would be 1/2 of the axle capacity. If you have a 3,500 lb capacity axle the
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How to Determine 3 Leaf Trailer Spring Capacity When all Dimensions are the Same for Two Springs
Determining the difference between two sets of springs that have different capacities can be difficult at best, especially if the spring has seen use. If you are talking about new springs that have not been exposed to the elements for a period of time, then our springs come in with the part number either painted on the top of the spring (concave side), or stamped into the band that is wrapped around the leafs. In the case of the # PR3 and # PR722 spring ours come in with paint on the top of t
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Spring Hanger Spacing Dimensions for a Tandem Axle Slipper Spring Suspension on a 14,0000 lb Trailer
The hanger spacing for a tandem axle trailer suspension setup can be determined, but you need to take into account the axle spacing needed for the overall diameter of your wheel and tire combination and the springs you will be using. Lets say that you plan on using 4 of the 5-Leaf Slipper Springs, # 1203T3, for 7,000-lb Trailer Axles, and that your wheel and tire combinations are the Karrier ST235/85R16 Wheel and Tire, # AM32764. The AM32764 wheel and tires overall diameter is 31.61 inches
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Rear Suspension Enhancement System For a 2007 20 Lark Tandem Axle Enclosed Trailer
Before you select a suspension enhancement system for your 2007 20 Lark tandem axle enclosed trailer you should verify the gross trailer weight of your trailer. Once you have determined the overall weight of your trailer when fully loaded, you can choose a suspension system that will effectively reduce sag and sway and provide a more comfortable ride. The Timbren Suspension Enhancement System for Light-Duty Trailers, # TTRA1702, that you referenced will not mount to an I-beam style trailer f
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What Could Cause a Homemade Trailer to Sway
When you are calculating the 40/60 split of weight on a trailer you are going to want to consider the entire length of the trailer. There could be a lot of reasons for trailer sway but your best defense against it is proper loading of the trailer. Heavier items should be at the bottom and the load should be even side to side. If the tongue weight is too low or too high, that could also cause sway. Typically, the tongue weight should be 10 to 15 percent of the gross trailer weight when loaded
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U-Bolts and Mounting Plates for a 2-3/8 Inch Diameter Round Axle with 2 Inch Wide Slipper Springs
Currently, a specific kit is not available but we do have the individual parts. For 2-3/8 inch diameter round axles you can use the U-bolt plate, # TRTP238200 and U-bolts, # SP01-040. I have also included a link to our FAQ article on slipper spring trailer suspension for you.
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4,500 lb Leaf Spring Recommendations for a Dual Axle Trailer
Generally speaking, the heavier the spring rate the rougher the ride will be when unloaded. That is the sacrifice that gets made when you go to a spring that will allow you to have a higher towing capacity. If you are concerned about ride quality and are positive that the trailer will never see more than 9,000 lbs then leaf springs # PR626 would be a good choice for you. Regardless of the springs you choose, you will be limited by the lowest rated component of your trailer. So if the axles
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Replacement Double Eye Springs and Suspension Kit for a Triple Axle Trailer
All of the hanger kits we have for double eye springs are going to be for 1-3/4 inch wide springs because that is what the majority of double eyes are presently. What you can do is replace the springs which would allow you to use the right hanger kit and provide you with all new suspension parts which is the ideal way to go. We carry one 26 inch long spring measured from the center of one eye to the center of the other eye. It is # PR626. Each spring has a capacity of 2,250 pounds. However, s
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Differences in the Redline Single-Axle Trailer Hanger Kits, # APS1, #APS2, and # APS3
The APS1, APS2, and APS3 are all suspension kits for single-axle trailers with 1-3/4-inch double-eye springs. They are designed for use on trailers with single, 2,000-lb to 7,000-lb axles. The difference in the kits are in the rear hangers and the shackle straps. The Redline Single-Axle Trailer Hanger Kit, part # APS1, uses the Redline Rear Hanger, part # 30-20, which uses a steel bushing and is .91 inches tall. The shackle straps are the Shackle Strap, part # TRSL313, which are 3-1/8 inc
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Does it Matter Which Way a Double-Eye Trailer Leaf Spring Faces
If they are double-eye leaf springs, it should not matter which way they are facing. But if they are slipper springs, the eye end is at the front and the slipper is at the back. The springs that we carry are not marked as to which end is front and I have seen them either way on a trailer. I have included some links to suspension FAQs for you.
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Replacement Leaf Springs for 1989 TeeNee Boat Trailer
As leaf springs become worn, they tend to flatten out, which would explain the slightly longer dimensions of your existing slipper spring. The correct replacement spring you need will depend on the capacity of your axle. If your TeeNee boat trailer uses a 3500 lb axle, then the # WIG4 is the correct replacement. For a 3000 lb axle, use # WIF4. Leaf springs should be replaced in pairs.
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What is the Weight Capacity for the Tandem-Axle Trailer Hanger Kit # APT9
The Tandem-Axle Trailer Hanger Kit, # APT9, is designed for a double-eye leaf spring setup which typically utilizes springs for 2,000 to 7,000 lb trailer axles, or up to 3,500 lbs for each spring, see link. The hanger kits are not given a capacity rating because they are designed to work with all of the springs that are sized correctly to work with the hangers. If your application is for trailer axles that are rated higher than 7,000 lbs capacity, you would need to go with a slipper spring se
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Determining the Leaf Spring Drop From an Empty Trailer to a Fully Loaded Trailer
The drop that you will experience with the 3-Leaf Double-Eye Spring for 2,500-lb Axles, # PR722, from a trailer at zero load to full load is going to be 1-1/2 inches. A few things to note with a fully loaded trailer is that you will want at least 3 inches of clearance above your tires and 2 to 2-1/2 inches of clearance from the top of your axle to the bottom of the frame where the leaf spring hangers are welded. You will also want to get the correct hanger kit for the leaf springs you choo
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