4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long

4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long

Item # SP-051275

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Trailer Leaf Spring Suspension

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4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long Leaf Springs SP-051275
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  • Leaf Springs
  • Springs
  • Double Eye Springs
  • 26 Inch Long
  • 4000 lbs
  • Universal Group
Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter. Lowest Prices for the best trailer leaf spring suspension from Universal Group. 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long part number SP-051275 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (129)
  • Q & A (42)
  • Videos (1)
  • Photos
  • Why etrailer?

Universal Group Trailer Leaf Spring Suspension - SP-051275

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter.


Features:

  • Leaf spring acts as part of your trailer's suspension system
    • Provides attachment point for your trailer's axle
  • Multiple leaves allow flexibility to absorb road shock
    • Allows for a smooth ride
    • Reduces wear and tear on trailer
    • Ensures level ride on bumpy and uneven surfaces
  • Sturdy steel construction
  • Nylon bushings included
  • Pre-mounted hangers or aftermarket hanger kit (sold separately) required for installation
    • Spring attaches to hanger mounted on trailer frame at one end
    • Other end connects to shackle straps suspended from hanger or equalizer


Specs:

  • Quantity: 1 leaf spring
  • Spring capacity: 2,000 lbs
  • Axle capacity: 4,000 lbs
  • Length from center of spring eye to center of spring eye: 26"
  • Spring width: 1-3/4"
  • Eye diameter with bushing: 9/16"
    • Eye diameter without bushing: 11/16"
  • Leaf thickness: 3/8"
  • Number of leaves: 4
  • Additional dimensions: see table


Double-Eye Spring

Part NumberABCD
SP-05127513"14"26"4-1/4"


Note: To ensure proper axle alignment and suspension performance, leaf springs should always be replaced in pairs.



Leaf springs are an integral part of your trailer suspension system. The leaf springs provide the attachment points for your trailer's axle, suspending it from the frame of your trailer. Each spring flexes to absorb road shock as you travel, allowing the axle to move somewhat independently of the rest of your trailer. This helps to reduce wear and tear on the trailer and also ensures a smooth ride.


Double-eye leaf springs attach to hangers that are welded onto your trailer. One end of this spring will attach directly to the hanger with a suspension bolt. The other end will attach to shackle straps that are suspended from a hanger. These straps allow the spring to move and pivot so that it can better compensate for uneven pavement. If you have a tandem- or triple-axle trailer, the shackle straps will be attached to the equalizer that connects multiple springs.


To mount this spring, you will need hangers, shackle straps, and suspension bolts. If you are simply replacing a spring, you may still have hangers welded onto your trailer. You should, however, replace your shackle straps because they are usually the first component to wear out. You may choose to replace old suspension bolts as well. It is recommended that you replace the other leaf spring in your setup at the same time. Because springs can sag and elongate as they wear, this new spring may not exactly match the old one, and the alignment of your trailer could be affected.


If you are fabricating a trailer, you will need to purchase a hanger kit for installation. To determine the type of hanger kit that you need, you must know the specific type of leaf spring that you have, as well as your axle capacity. Depending on the hanger kits used with them, springs can be configured to work for single-, tandem- or triple-axle applications. Hangers and other suspension components can also be purchased separately if there isn't a complete kit that works for your setup.



UNA-051 Universal Group Double Eye Trailer Leaf Spring - 4 Leaf - 2,000-lb Capacity







Video of 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long


Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Universal Group Trailer Suspension - Leaf Spring Suspension - SP-051275 Review

Today we're going to take a look at the four leaf doublized spring for 4,000 pound trailer axle. This is made of a strong, durable steel construction. It is designed to flex to absorb road shock and provide a nice smooth ride which will help reduce wear and tear on your trailer. It ensures a nice level ride on bumpy and uneven surfaces, and it does mount to your trailer frame with hangers or a hanger kit which we do also sell on our website. Lots of times they are listed on the product page as a related product. If you notice in the eyes themselves that those include the nylon bushing.

A few specs on this: the spring capacity of this one spring is 2,000 pounds. When this is matched with another one on the other side of the axle, it will match the axle capacity of 4,000 pounds. Again, this is a four leaf. You can see one, two, three, four. Now, there are a couple of measurements I want to give you, the spring length and the width. We'll take a tape measure.

The spring length is measured from the center of this side to the center of this side. If we go center to center, you can see 26 inches for the spring length. Now, the spring width should be measured from this end to this end. You put the tape measure on it, one and three quarter inches. Now, the eye diameter on the eyes is nine sixteenths of an inch.

This part is for a quantity of one spring. One last note I do want to mention is when you do replace this leaf spring to ensure proper axle alignment and suspension performance, you do want to make sure that these leaf springs are replaced in pairs. That should do it for the review on the four leaf doublized spring for 4,000 pound trailer axle.


Customer Reviews

4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long - SP-051275

Average Customer Rating:  4.9 out of 5 stars   (129 Customer Reviews)

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter.

- SP-051275
by:

I replaced 3500lb axle springs with these 4000lb axle springs. Super easy. Good fits all the way around. Also suspension upgrade from Moryde, new Goodyear endurance on steel. Correct parts every time, faster delivery than anywhere. Too easy. Dont waste your time going anywhere else. 638015



- SP-051275
by:

These springs are much stronger than what I first ordered, thank you for sending my return tag, I measured wrong the first time. These springs with an inch shorter in length & an inch more arch work perfect & give the tires more room. Thanks again for the great service from all of your operators. I must say, even with shipping the experience & service was well worth it. 374448


Comments

holding strong! tires running true.

Jerry k - 05/02/2018

38041

- SP-051275
by:

upgraded springs one size bigger than stock helped stabilize trailer when fully loaded 559372



- SP-051275
by:

I installed these new springs this past weekend, replacing the old rusted and broken set. All fit well and were easy to replace. Just returned from a 700 mile trip and hauled back a 1000 pound farm rotary tiller. The trailer road very smoothly without any issues. I highly recommend etrailer for all of your trailer and other equipment needs. Thanks for the quick shipping and talented support staff. 369207



- SP-051275
by:

Very happy! My new leaf springs for our camp trailer came earlier than expected. Exactly what I ordered. Only 1 broke but decidex to replace all 4. Doing the replacement only took me 2 hours by myself so we are back on the road again. The website was very easy to navigate. Free shipping and excellent price, who could be happier. 477128



- SP-051275
by:

The springs that I ordered are of good quality and shipping was exactly ontime with what was suggested to me. Would prefer them to be made in the USA but they will work for the price and quality for my purpose. I had a trailer spring break on my snowmobile trailer and needed to fix immediately.I would recommend etrailer to anyone. 414622



- SP-051275
by:

Using etrailer.com has been a great experience. They have a huge selection of trailer parts and make it very easy to find the right parts. The packaging seems to have gotten alot better. Very sturdy box. It arrived within a few days from ordering which was a huge plus. I was able to get the job done sooner than planned. That kind of experience will keep me loyal to etrailer for any future trailer parts needs. Thanks guys and gals. Keep up the great work. As far as the parts, eveything was heavier duty than factory. Since I measured the old parts I was able to find the exact replacements for those parts. The job went so smoothly without any issues. These springs raised the trailer height without any load on the axles 1.5 inches. It was definitely time for new springs and hardware. Im kind of glad the one spring broke. 469464



- SP-051275
by:

Received day expected! Installed without any problems, everything was in good condition, thank you for excellent service. 529885



- SP-051275
by:

Fit exactly. Great customer service when I called to discuss what I needed! 683106



- SP-051275
by:

Installed the dexter 3500 axle and new springs on my 17ft boat trailer and immediately drove the trailer for over 700 miles in one day and the trailer was as smooth as could be. Great axle even came with a tub of marine grease. 679754



- SP-051275
by:

I called customer service and worked with William B. He was patient and listened while i described problem and sent pictures to him for review and advice. He took time to search forums and find out specifications of the boat trailer which happened to be quite old. Helped solve a challenging problem and called me back quickly when had some questions about my order. he also sent me an email about the status of the order and let me know when it shipped. I was very impressed with the customer service. I ordered several size options and etrailer was great to work with. The trailer was for a boat MasterCraft Prostar 205 from '90s and wasn't able to measure the springs correctly because it was 3 hours drive away. Thanks for great service. 678326



- SP-051275
by:

This is how a business should be run! Always fast shipping and helpful service people. 676746



- SP-051275
by:

Thanks for the help and information 674757



- SP-051275
by:

Nice springs for the dollar. No complaints! Would like to find some local spring manufacturer, as made in USA is important to me! 673063



- SP-051275
by:

Great springs for our 32’ camper. The 3500 lb factory springs were failing after 5 years and cause the camper to sway going down the road, lean to one side parked and the tires to bottom out. Installed 4 new 4000 lb springs and all is good. Lifted the 6800 lb gross up by 1.5 inches and tracks down the road like new. Took about 4 hours start to finish. We saved hundred doing it ourselves too. 671425



- SP-051275
by:

The website is amazing. All I had to do was put int the brand and name of my trailer and the correct springs came up. And they fit. They shipped on Sunday to get them to me so we can still make our summer trip. Will do business with etrailer again. Lynn 668849



- SP-051275
by:

Everything good as always 666967



- SP-051275
by:

Great turn around time.. I give these guys high marks because the process was simple and quick.. I got an email with 10 min of my order issue on my part. I corrected the issue and the part was at my door in 3 days.. thank you it was a pleasure doing business with you.. 665017



- SP-051275
by:

Great springs! Easy to install and more than heavy enough to do the job. No issues after the first year at all. Service was excellent and received springs and mounting hardware quickly. Thanks for all your help! Highly recommend to anyone needing new springs for their trailer 662970



- SP-051275
by:

Installed new springs, equalizers and hangers on a 16 year old dual axle 20 ft boat trailer. These springs have one additional spring, 4 vs. 3. Gained improvements in trailering, how boat sits on trailer and expect to see better tire wear. 662907



- SP-051275
by:

So far so good! Very good price, quick delivery, just had to contact them for a receipt. We'll see how that goes but so far very pleased. 661820



- SP-051275
by:

Very nice spring. Well made. A real val ue. 661693



- SP-051275
by:

I replaced the nylon bushings with brass bushings, but otherwise just what I needed. 656859



- SP-051275
by:

Good quality materials and workmanship. Items were as described and work great on my custom built flat bed trailer project. 655952



- SP-051275
by:

Springs were right on the money. Thank- you 652760



- SP-051275
by:

Very good service and reasonable price. Spring worked good to replace one with a broken top leaf. 644539



- SP-051275
by:

very easy installation to repair broken spring 640427



- SP-051275
by:

Order filled quickly and delivered on time. Just what I needed. 641976



- SP-051275
by:

springs worked great for trailer suspension rebuilt. 639699



- SP-051275
by:

Overall terrific experience 640977



- SP-051275
by:

Installed springs on customers trailer to increase GVW. Hauling great. 637297



- SP-051275
by:

Perfect fit, Great customer service. 635120



- SP-051275
by:

Product was early getting here. Perfect fit. Great service. 635119



- SP-051275
by:

The springs were great upgrade to my trailer live the new ones. 634633



- SP-051275
by:

Exactly what I ordered, they fit perfec tly..Thx 634620



- SP-051275
by:

Good product. Quality made and perfect fit. Order was processed quickly and arrived faster than in I expected. This is where I will go to get all of my trailer parts. 629810



- SP-051275
by:

I have been happy with all of your services so far . Brandon has a wealth of knowledge also. 628042



- SP-051275
by:

Fit and function are as described. No issues, no problems. 625317



- SP-051275
by:

Thank you for the great service I will be using you in the future 620038



- SP-051275
by:

EVERYTHING WENT AS PLANNED , WORKED OUT GREAT 619718



- SP-051275
by:

Great product and price 609072



- SP-051275
by:

Fast accurate and great pricing 609095



- SP-051275
by:

The leaf springs worked great. They were a great price, fast shipment and great instructions on installation. Recommend this company for any future need for our trailer. 606103



- SP-051275
by:

Very sturdy built springs and fit right in place! Nicely priced also. 604592



- SP-051275
by:

EXCELLENT AAAA+++++ 603470



- SP-051275
by:

Perfect fit, easy repair! 602304



- SP-051275
by:

Great fit, time will tell if the quality is good 597057



- SP-051275
by:

Fit perfect. 596164



- SP-051275
by:

These fit the application they were made for and easy to install. 594402



- SP-051275
by:

Etrailer are the most helpful people you can ask for. You can't go wrong with them 581373


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Ask the Experts about this Universal Group Trailer Leaf Spring Suspension

Do you have a question about this Trailer Leaf Spring Suspension?


  • Replacement 26 Inch Leaf Springs, Shackle Straps, And U-Bolts
  • To give you the correct leaf springs, I would need to know the capacity of your axle or what your Gross Vehicle Weight Rating (GVWR) is not just the weight of the trailer itself. This is the loaded capacity of the trailer. We have a few options for 26 inch leaf springs: 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # SP-051275 4-Leaf Double-Eye Spring for 2,000-lb Trailer Axles - 26" Long # SP-124275 6-Leaf Double-Eye Spring for 4,500-lb Trailer Axles - 26" Long...
    view full answer...

  • 25-1/4 inch Long Trailer Leaf Spring Recommendation for 4,000 lb Axle
  • I attached a page that has all of the double eye springs we carry that are 25-1/4 inches long from eye to eye. For a spring with the same capacity as the one that you referenced the part # SP-220275 would be what you need.
    view full answer...

  • Replacement Trailer Leaf Springs for 5200-lb Axle
  • When a trailer leaf spring is well worn it can become elongated. Springs can flatten out and become as much as a 3/4-inch longer, measured eye to eye, than when they were brand new. So the correct replacement spring for your suspension might measure shorter than the worn spring you removed. That said, we do have several 26-inch leaf spring for various axle ratings from 2000- to 6000-lbs. The linked page displays all leaf springs and the filters on the page will let you select the axle...
    view full answer...

  • Selecting Replacement Leaf Springs for Enclosed Trailer
  • Leaf springs stretch with use and age and to make sure you match their length, as well as their capacity, you will want to pull one out of the trailer's suspension so you can measure its eye-to-eye length. A well-used spring can stretch as much as 1/2-inch from its original length. If your hanger hole spacing is 25-inches on center then you may well need a 25-1/4-inch like # SP-220275 but the length of your shackles comes into play too. The spring eye dimension should be longer than...
    view full answer...

  • Correct Leaf Spring for Trailer with Lippert 3,500 lb Axle
  • Thank you for the photo! I was able to use the serial number on your axle to determine which is the correct replacement leaf spring for your trailer. For this, you are going to want to use the 3-Leaf Double-Eye Spring part # SP-220275 which is a double eye leaf spring that is 1-3/4" wide, has a 4,000 lb total weight capacity, and a 25-1/4" eye to eye measurement. The measurement you provided of 26" long is correct but the leaf spring needs to be measured while unloaded as it will lengthen...
    view full answer...

  • Replacement Leaf Springs, Equalizers, and U-bolts for ALKO T52 Axles
  • Those may not be the original springs on your Springdale. According to ALKO the T52 axle would either have a 5 or 6 leaf spring at a length of 26 inches. To be accurate the springs should be measured with no weight on them because they will otherwise flatten out some leading to a longer measurement. ALKO shows the 4-leaf spring for the T52 at a length of 25-1/4 inches. If you measure it at about 25-1/4 inches with no weight on the spring then you can use # SP-218275 for 5K axles. If...
    view full answer...

  • Recommended Replacement Leaf Springs For Loadmaster Trailer With 3500-Lb Axle
  • We do have a leaf spring that will work for your trailer but it is designed for a 4,000-lb axle It is part # SP-051275. This is a 4-leaf double eye spring and it measures 26-inches center-of-eye-to-center-of-eye. You may notice a little difference with these springs on your trailer. The ride could be a little stiffer, and when the trailer is empty it may bounce a little more but the length of the springs will work for you. If you are wanting to use a shorter leaf spring you may...
    view full answer...

  • Bolts Needed To Install Slipper Springs
  • For the spring eye you would use the Spring-Eye Bolt with Locknut for Slipper Springs - 3-1/2" Long # 166079, but slipper springs don't have the second spring eye, so a bolt is not used on the back end. You can also use a wet bolt like # 126B2, for less friction. The Shackle Bolt with Locknut for Double-Eye Springs - 3" Long # 166081 are for use with the spring and shackle straps used with a shackle straps on a tandem setup with an equalizer but it could be used for the springs and the...
    view full answer...

  • Double Eye 26 inch long 3 Leaf, Leaf Spring Availability
  • The closest match that we currently have to the leaf spring that you are looking to replace is either part # SP-124275 which is rated for 2,000 lbs or part # SP-051275 which is rated for 4,000 lbs. They both are double eye leaf springs that are 26 inches long but they look like they fall outside of your weight range and they both have 4 leaf springs instead of 3. For a 2,500 lb 3-Leaf Double-Eye Spring we have part # SP-219275 which measures 25-1/8 inches on center. For a 3,500 lb...
    view full answer...

  • How to Determine the Correct Replacement Double-Eye Trailer Leaf Spring for a Boat Trailer
  • A trailer leaf spring will wear out over time and the wear will likely lengthen the spring. Therefore, the correct replacement leaf spring will likely be shorter than the leaf spring you have on your trailer now depending on the amount of wear that has occured. If the leaf springs you have on your trailer now are 26-1/2" long from the center of each eyelet, I recommend using a 26" long leaf spring like part # SP-124275 for 2,000 lb, part # SP-051275 for 4,000 lbs, part # SP-256275...
    view full answer...

  • 26 Inch Leaf Springs for Axles Rated at 5,200 lbs
  • We do have a solution for you although we don't carry a leaf spring for a 5,200 lb axle that has the same dimensions as Leaf Spring # SP-051275. What does have the same dimensions is the 26" Double-Eye Spring for 6,000-lb Trailer Axles # SP-053275 which will work for you despite being rated for more than your axle's capacity; they are rated close enough to your 5,200 lb axles that you won't have to worry about the springs causing a stiff ride.
    view full answer...

  • Replacement Spring for Boat Trailer
  • Thank you for the information. When it comes to replacement springs, the eye-to-eye distance and weight capacity are the most important factors. Springs flatten - or stretch - over time, so your 26-3/4 inch springs were likely 26 inches. There are two possible four-leaf options for you, and the right one will depend on your axle's weight capacity. Spring # SP-051275 is for an axle with a capacity of 4,000 lbs. The other spring is # SP-124275, which is for an axle with a capacity of...
    view full answer...

  • How to Pick Out Replacement Leaf Springs for Boat Trailer
  • When replacing trailer leaf springs we strongly recommend you replace them in pairs. I would urge you to get a set of matching properly rated springs for your trailer as soon as possible. If you look on the frame of your trailer there should be a plate with the trailer VIN number and the axle capacities of the trailer. You will want to pick leaf springs that are as close to the axle capacity as possible. You will want to also measure the distance from eye to eye of your old leaf springs...
    view full answer...

  • Tips for Picking Out Travel Trailer Leaf Springs to Replace 20 Year Old Springs that Measure 26 in
  • Leaf springs do have a tendency to stretch as they age. With springs 20 years old I'd imagine they've stretched a decent amount. Most likely you'd need a spring in the 25-1/8 inch to 25-1/4 inch range but we also need to determine capacity axles you have so that we can pick you out the correct rated spring. Due to the age of your trailer suspension it would be a great idea for you to replace all the springs now too. If you aren't sure of the axle capacity let me know the diameter of the...
    view full answer...

  • Spacing Measurements for Tandem-Axle Trailer Hanger Kit APT5 & Spring SP-051275
  • When setting up a new trailer suspension it is best to do a mock-up (by clamping or tack welding the parts in place) to allow you to see how the system functions. There are so many variables that is best to test. Typical spacing dimensions for 25-1/8-inch springs are shown in the chart on the page for # APT5. Since the springs you intend to use, 4-Leaf Double-Eye Spring # SP-051275, are 7/8-inch longer than those listed in the chart, you will want to increase the hanger spacing approximately...
    view full answer...

  • How to Replace 26-1/2 inch Leaf Springs on Trailer
  • Since old springs tend to stretch out about 1/2 inch you would want a 26 inch spring to replace what you have. Which we carry several. See the attached link. You would need to select the filter on the page that has the axle capacity that matches your trailer and it would be the correct fit. The part # SP-051275 that you referenced is for 4,000 lb axles.
    view full answer...

  • Will these leaf springs work SP-051275
  • There a few more measurements that are needed off of your current leaf springs to guarantee that you will find the correct replacement leaf spring. I have attach a diagram that will show the other measurements that are needed. You have the first measurement with the eye-to-eye distance. To find the correct replacement you will also need the spring height, measured from top of the center of the spring to the center of the eye. Also needed is the distance from the spring center to the...
    view full answer...

  • Replacing Slipper Springs With Double-Eye Springs
  • There are no U-bolts to attach the slipper part, I recommend replacing your slipper springs with double eye springs. In order to do this you need to know the weight rating of your axle as well as the length from center eye to center eye so you can properly place your hangers. For example, the 4-Leaf Double-Eye Spring # SP-051275 measures 26 inches from center of spring eye to center of spring eye and has a 4,000 lb capacity; you will need to find springs that match your trailer's capacity...
    view full answer...

  • Recommended 26 Inch Leaf Springs for 3750 lb Tandem Axle Boat Trailer
  • The 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # SP-051275 will be the closest fit for your 3750 lb axle. Having leaf springs rated slightly higher is normal because you will be limited in capacity by the weakest component on your trailer and normally you want that to be your axle. These springs will not be too strong for that axle as to cause too firm a ride.
    view full answer...

  • 25-1/4 inch Leaf Spring Recommendation for Travel Trailer with Tandem Axles
  • 20 year old leaf springs on a trailer could easily stretch 3/4 of an inch. Going with a 25-1/4 inch spring like you mentioned would be great. Since your springs are 3 inch in diameter that would indicate that most likely you have a 5,200 lb axle as that's a very common rating for that size. For a 25-1/4 inch length spring we have the part # SP-218275 which has a 5,000 lb capacity. # SP-220275 which has a 4,000 lb capacity, and # SP-115275 which has a 6,000 lb capacity. Suspension components...
    view full answer...

  • Recommendation For Hanger And Shackle Spacing For 26 Inch Leaf Springs
  • I contacted the manufacturer to confirm what you need to do for installation of the 4-Leaf Double-Eye Springs, Item # SP-051275. The hangers should be spaced at approximately 30-1/4 inches for 26 inch leaf springs. The shackle point from the bottom of the equalizer should be pointing upward for the front and back at about 60-70 degrees. Please contact us if you have other questions.
    view full answer...

  • Can Boat Trailer Replace Slipper Springs With Double Eye Springs?
  • Yes, you can replace your slipper springs with double eye springs. The Double-Eye Spring # SP-051275 measure 26 inches from center of spring eye to center of spring eye and would work for you; these have a 2,000 lb capacity each though you will need to find springs that match your trailer's capacity as closely as possible. The other thing you would need is a hanger kit such as # APS3, which has 1-1/2" tall front hangers, 1-1/4" tall rear hangers, and 3-1/8" shackle straps. The correct...
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  • Replacing 4-Leaf Double Eye Springs with 6-Leaf Double Eye Springs on 4,400 Pound Axle
  • Installing slightly over-rated leaf springs on a trailer shouldn't cause any damage to the axle or other suspension components. There is no reason to replace the axle on your trailer with a higher-rated unit so that it matches the springs. Over-rated leaf springs may cause a bit of a rougher ride but I suspect that the "springy" experience you described has more to do with the noticeable difference between old worn-out springs and brand new ones that are in good condition. The difference...
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  • Hanger Placement for Trailer Using Both Double Eye and Slipper Spring Leaf Springs
  • Normally you don't see double eye and slipper springs on the same trailer but if you don't want to change springs then we will have to work with what you have. The only issue is that most modern trailer double eye springs are 1-3/4 inches wide so a 2 inch hanger would allow for too much play unless that slack is taken up. To determine the spring hanger placement we first need to figure out where the center point between the 2 axles needs to be. To do that take a look at the picture I...
    view full answer...

  • Clearance Requirements Between Trailer Tires and Fenders and How to Calculate Tandem Axle Positions
  • As far as clearance between the tops of the tires and the bottoms of the fenders look for at least 3 inches to account for the suspension travel. As far as the placement of the axles it all depends. Take a look at the picture I have included that shows how to calculate axle position. You might have to do some estimating but it will at least get you close to the ideal positioning.
    view full answer...

  • Arch Height of Universal Group Leaf Spring
  • The manufacturer of # SP-051275 is Universal Group and the arch measures 4-1/4 inches high. I've attached a photo for you to see.
    view full answer...

  • Replacement Trailer Leaf Spring Recommendation for Trailer with 26-1/2 inch long Springs
  • Since trailer leaf springs tend to stretch out over time when you pick out a new one you want to go with one that measures just slightly shorter than what came off the trailer. Since yours is 26-1/2 inches a 26 inch long spring like the # SP-051275 would work well if you need a 4k rated leaf spring. If you need a different axle capacity you would need to check out the link I attached that has all of the 26 inch long springs we carry.
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  • Leaf Spring Recommendation for 10k Trailer with 26-1/4 inch Springs
  • Your 10k trailer with dual axles is going to have two 5k rated axles (most likely). The only double eye spring we have that would match that capacity is the part # SP-218275 but it would be about an inch too short as it measures 25-1/4 inches. You should note that old springs typically stretch out around 1/4-1/2 inch as they flatten over time. Dimensionally the correct spring we have would be the part # SP-051275 as it is right at 26 inches. This is for a 4k axle though. Best...
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  • How to Get Clearance for Slipper Spring Compressing on Top of Wheel Well
  • To answer your first question a double-eye spring would not compress less than your current 4-Leaf Slipper Spring w/ Open Eye End # SP-264275 and I do not recommend going with a higher-rated spring than what your trailer is rated for as that will make your ride very stiff and unpleasant. The only real options you have to get more clearance are to raise the fender if you can or add one that has more height (I have linked our selection of fenders for you to check out) or to cut off your...
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Info for this part was:

Expert Research:
Michael H
Installed by:
Jeff D
Expert Research:
Jameson C
Expert Research:
Adam R
Written by:
Alexander C
Photos by:
Jeffrey L

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