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  1. Trailer Leaf Spring Suspension
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4-Leaf Double-Eye Spring for 5,000-lb Trailer Axles - 25-1/4" Long

4-Leaf Double-Eye Spring for 5,000-lb Trailer Axles - 25-1/4" Long

Item # SP-218275
Our Price: $73.16
Trailer Leaf Spring Suspension
This item qualifies for Free Shipping
Shipping Weight: 14 lbs
Quantity: 
In Stock
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Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 5,000-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 5,000-lb Trailer Axles - 25-1/4" Long part number SP-218275 can be ordered online at etrailer.com or call 1-800-496-5010 for expert service.
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Universal Group Trailer Leaf Spring Suspension - SP-218275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf Springs
  • Double Eye Springs
  • 25-1/4 Inch Long
  • 5000 lbs
  • Universal Group

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 5,000-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: 2,500 lbs
  • Axle capacity: 5,000 lbs
  • Length from center of spring eye to center of spring eye (unloaded): 25-1/4"
  • 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-21827512-5/8"13-1/4"25-1/4"3"


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-218 Universal Group Double Eye Trailer Leaf Spring - 4 Leaf - 2,500-lb Capacity

Replaces PR4





Customer Satisfaction Score:


Customer Reviews

4-Leaf Double-Eye Spring for 5,000-lb Trailer Axles - 25-1/4" Long - SP-218275

Average Customer Rating:  4.9 out of 5 stars   (286 Customer Reviews)

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 5,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter.

by:

The web site is great. Easy to locate items and order. I ordered 4 leaf springs and 4 u-bolt kits.
The order was very quickly processed and shipped. I ordered on a Saturday and had them by Thursday. Awesome!
The packaging could have been better. All items were placed loose in a box. By the time it showed up the box was very beat up from the loose springs sliding around in the box. Two large holes were torn in the box with the ends of the springs sticking out. One of the packages with the u bolts and nuts was damaged and a couple of the nuts were rattling around loose in the box. Surprisingly none had fallen out of the box.
If UPS had treated to box a little more carefully it probably would have been o.k. but when you have 70 pounds of steel sliding around loose something is going to happen.
Still love etrailer though!




by:

I had a leaf spring break on my travel trailer and had some difficulty finding a local dealer for the parts. After doing some google searching, I came across etrailer. I matched the spring size and weight capability with one on etrailer and they shipped it super fast. I also ordered the suspension upgrade kit to go along with the new leaf springs. Ordered on Saturday and got it on Wednesday. I will be coming back to etrailer. Thanks for helping me get my camper back on the road.




by:

Unfortunately, these are Chinese, like just about everything else these days. Prior to installation, I sprayed them with liquid galvanizing compound, and followed that with a rust preventative paint. Within a month, they were a rusty mess. To be fair, I live on an Island, and salt air is the norm, but the trailer is thoroughly rinsed in fresh water after each use. They still work, we’ll see for how long.




by:

Order arrived on time with no issues. Springs were easy to replace using existing bolts and shackles (not worn out). These heavier duty springs provided my trailer and boat the protection needed from chuck holes and bumpy RR crossings. The only thing I would like to see is a sekection of longer heavy duty shackles to improve clearance for the tire from the fender wheel well on my Rangertrail.




by:

Almost exactly a year after I installed this on one side of my travel trailer, the one on the other side broke. Lesson learned — replace both sides at the same time.




by:

Used these to replace some over loaded 3500 springs on a tall cargo trailer. Perfect fit and finish and the trailer pulls significantly nicer now!




by:

etrailer was quick to answer any question and was fair in price. They said we wold get it on a certain day there it was at my front door and best it fit our trailer wow!




by:

I ordered these to replace 4400# springs on our fifth wheel that are 10 years old. I was expecting the ride height to increase but it did not. They appear to be of acceptable quality but as with most products time will tell. We haven't used them yet but are planning a long trip next month.


Comments
Its been a year now. One long trip out west and no issues. No sag at all. Overall positive results with these reasonably priced springs.
Randy R - 08/28/2017


by:

Total refit. Three axles, six springs, all pivot point bolts, bushings and link plates. Excellent pricing (the best I found). Super quick delivery, like three days. And free shipping on an order weighing close to fifty pounds?

Best of all the company followed up a year later to see how it went. It went great, which why I'm writing this review. Quality, fitment, price, delivery, support. Five stars.




by:

Parts came in quick and were as advertised. Easy to install. Might want to brush up on stick welding or pay $80-$100 to weld the pedestals for extra security. Kit raised my trailer 4-5 inches, which is just what I needed. The torque limits for the hardware were a little to wide (i.e. XX-XX lbs). That's a XX lb range. Overall very happy with price and product!




by:

Fits great. Identical to original. Great service from etrailer.




by:

The springs were installed without any problems. The wet-bolt bushings pressed into the spring eyes as they should, with no deformation such as what had been the case with the springs supplied with the OEM axle.




by:

Changed out 4 broken springs for 4 new ones. They were a perfect fit and pretty easy to change. As far as customer service is concerned I wasn’t on the phone for more than 5 minutes and springs were on the way. I will definitely use etrailer again on my upcoming boat trailer project!!




by:

Excellent product, perfect fit and very easy to install. Attached is the pics of the new leaf spring, with my old and broken leaf springs. Thanks etrailer for getting my camper back on the road.




by:

No issue with installation - fit perfectly. If I had any complaints... I wish these were not made in China.
They should be made here in the USA.




by:

The spring arrived yesterday late afternoon, I installed it this morning, it is the right spring. I appreciate the effort on your part by contacting Dexter to determine which spring was needed and sending it in a timely fashion this is not my first experience with you people and I have always been satisfied and will continue to recommend you in the future.




by:

Quick shipping and installation got the trailer back on the road




by:

Worked with Quinn to get these delivered to us ASAP as we were broken down many miles from home in a very small remote town in Arizona. Everything went exactly as planned. Springs arrived yesterday and we are repaired today. Thank you etrailer




by:

Had to replace a broken leaf spring on an older dump trailer. Having previously purchased products from etrailer I looked at their website first. Quickly found what I was looking for and made the purchase. There was also helpful information on their site to insure I ordered the correct springs.


Comments
The leaf springs are still working as intended
Craig I - 06/09/2021


by:

The springs fit exactly. They were easy to install. Replaced old wron out 2000 lb springs. I can't to take my trailer out on the road with these new springs.




by:

Easy ordering and super fast shipping.




by:

These were an upgrade for our GD Imagine travel trailer. We replaced 1750 springs and the trailer expert who just recently performed our 1 yr inspection, was impressed, and glad we invested in quality for the good of our trailer.
I have the experts at etrailer to thank for helping me choose these items.




by:

I replaced my leaf springs, drums, brakes and added the Dexter E-Z Suspension kit to my Keystone Cougar Fifth Wheel trailer last year. This was my first time working with etrailer and I can’t say enough about how well it all went from the ordering to the install.
Tammie P did a amazing job with knowing what parts would work best on my trailer. Tammie also gave me updates on my deliveries that I appreciated. I had a trip planned short after I received my parts. So having someone at their end checking on arrival dates helped. In the future I will definitely use etrailer for all my trailer needs. Thanks again for all the help! Great Team....




by:

Fit perfect and super fast delivery . Couldn't have been better !! thank you




by:

The springs fit perfectly, thanks!



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Show More Reviews

See what our Experts say about this Universal Group Trailer Leaf Spring Suspension

  • 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...
    view full answer...
  • Which Orientation are Leaf Springs Installed In
    The 12-5/8 inch dimension from the spring eye to the cinch bolt of the # SP-218275 leaf spring (dimension C in the diagram) is symmetrical, so the spring could be mounted in either direction. Customarily, the end of the spring with the band wrapped around it is placed forward of the axle, closest to the front of the trailer, but it really makes no difference. On leaf springs that are asymmetrical, the shorter distance would be forward of the axle.
    view full answer...
  • Recommended Spring Eye Diameter Bolt for 9/16 Inch Hole on my Boat Trailers Leaf Spring
    I would recommend getting the 9/16 inch diameter bolts for your leaf spring, because the diameter should match the bushing or bolt hole inner diameter. I have linked all the 9/16 inch bolts we have for your convenience, you will just need to select the length you are in need of.
    view full answer...
  • Troubleshooting Trailer That Rocks Side to Side While Being Towed
    Is your trailer sitting as level as possible? It almost sounds like your trailer is sitting nose high based on the movement you described. You will want your trailer sitting as level as possible with at least 6 inches between the trailer overhang and bed rails of the truck. You can change the height of the nose of the trailer with the fifth wheel hitch head and the pin box height. Other than that check the conditions of the suspension components to make sure nothing is worn out and would...
    view full answer...
  • How to Pick Out Replacement Leaf Spring for Jayco Fifth Wheel
    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...
  • How to Select Replacement Leaf Springs for Tandem Axle Boat Trailer
    We can help you with replacement leaf springs for your tandem axle boat trailer. We recommend to replace the springs on both sides of the trailer axle, not just the one broken one, to avoid problems with the trailer tracking straight as you go down the road. If you click on the linked page you'll see our main page for trailer springs. Just click on the type you need, double-eye or slipper, and then on the axle weight rating. Usually there will be a sticker on your axle that tells you its...
    view full answer...
  • Thickness of the Double Eye Leaf Springs PR4
    I went out to the warehouse and measured one of the # SP-218275 Double Eye Leaf Springs we have in stock. The spring pack is 1-9/16 inch thick, not including the centering bolt and nut. Each layer (or leaf) is approximately 3/8 inch thick.
    view full answer...
  • Can Heavier Leaf Springs Be Used On Tandem-Axle Boat Trailer
    You can use heavier-duty leaf springs like part # SP-218275 on your tandem axle boat trailer. The dimensions of the springs are the same so you will have no problem installing the new springs.The ride may be a bit stiffer with the new springs but they will work just fine on your trailer. Putting heavier springs on your trailer will not increase the weight capacity for the trailer. Since you mentioned you are replacing the suspension I have attached some links to suspension components...
    view full answer...
  • Leaf Spring U-Bolt and Electric Brake Backing Plate Bolt Torque Ratings
    You will first want to determine if your u-bolts on your leaf springs are 3/8 inch or 1/2 inch u-bolts. The torque for the u-bolts are a minimum of 30 ft-lb and a maximum of 40 ft-lb for 3/8 inch u-bolts or a minimum of 45 ft-lb and a maximum of 60 ft-lb for 1/2 inch u-bolts. The bolts used to secure the electric brake to the backing plate do not have a specific torque rating, but can be hand tightened until the split lock washer is flattened and then an additional 1/4 turn. I have included...
    view full answer...
  • How To Determine Where to Place Axles on a Tandem Axle Trailer
    To determine the location for the front and rear hangers on your tandem axle trailer you will first need to make sure that you have the correct center point for your equalizer hanger. The center point of your equalizer hanger needs to be located where you will have 60 percent of the frame of the trailer in front of the center of the equalizer hanger and 40 percent behind the center of the equalizer hanger. For example, if the trailers frames length is 18 feet, then the center-line location...
    view full answer...
    Image 1 for
  • Replacement Leaf Springs for Tandem Axle Trailer
    To determine the correct replacement springs there are a couple of things you will want to look at. First, you will need to know the axle capacity. This information should be on a sticker or plate on the trailer tongue or frame somewhere. If you cannot find this information it could be stamped on the axle somewhere. And if you cannot find it there then you could go by the axle diameter, if it is a round axle: 1,000-lb - 2,000-lb Axles: 1-1/2" - 1-3/4" diameter 3,500-lb Axles: 2-3/8" diameter...
    view full answer...
  • How to Determine the Right Replacement Double-Eye Leaf Spring for a Golf Cart Trailer
    To choose replacement leaf springs you would have to go by the measurements of the old springs and the capacity of the axle (or individual spring). The # SP-218275 spring measures 25-1/4 inches from eye center to eye center. And it is rated for 2,400 pounds for a 4,800 pound axle. Springs should also be replaced in pairs. To measure a spring you will need to have the weight off of it. A worn spring will flatten out some so the measurements may not be exactly the same as a new spring. I...
    view full answer...
  • Does Adding an Axle to a Trailer Double its Capacity
    The axle capacity for a trailer does double when you add a second one to a trailer. This does not mean the trailer has double the capacity since the frame of the trailer may have the capacity. A trailer's overall capacity is only as strong as it's weakest link. That could be the axles, tires, suspension, trailer frame, coupler, etc. The best way to pick out leaf springs is to pick a set that matches the capacity for the axles/trailer the best. If you have 3,500 lb axles you would want...
    view full answer...
  • Should Trailer with Extended Axles be Returned to Stock Condition
    If it were my trailer and I didn't need the extra width I would put it back to the stock configuration. I would be afraid that the extensions would add too much stress and lead to excessive tire where, tracking and suspension problems, and possible failure. The other solution would be to set up the trailer properly for the extra width which would be more expensive and involve more work than just putting it back to stock.
    view full answer...
  • Will Double-Eye Springs # PR4 Fit 2004 Cardinal Travel Trailer w/ Rockwell American 93103 Springs
    I made a call to my contact at Rockwell American and was able to obtain some information on the springs that are currently on your 2004 Cardinal travel trailer. Your current springs, 93103, have an axle capacity of 4,400 lbs, are 1-3/4 inch wide, and measure 25-1/4 inches from center eye to center eye so the 4-Leaf Double-Eye Spring, # SP-218275, will work for you. This spring is a very close match with the only difference being the slightly higher axle capacity at 4,800 lbs. I have attached...
    view full answer...
  • Trailer Hanger Spacing and Installation for Trailer Fabrication
    Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are based on our preassembled kits. Once you have all of these parts, you will want to mock up the hanger spacing before permanently attaching the hangers or torqueing down the bolts. A good spacing to start with is 29-1/2 inches between the front and center hanger and 29-1/2 inches between the rear and center hanger. Remember,...
    view full answer...
    Image 1 for
  • Can Changing Trailer Springs to Higher Rating Cause Axle Damage or Increase Trailer Weight Rating
    Installing heavier springs in your trailer's suspension will not directly cause any damage to your axle. But also note that changing your trailer's leaf spring suspension from 3500-lb rated springs to 4800-lb rated springs will not necessarily increase the trailer's weight capacity. Springs are one part of the entire suspension system and changing one item is no guarantee of increased capacity. All of the trailer's parts - its tires, wheels, hubs, axles, suspension and frame - all have...
    view full answer...
  • Why Does a Shorter Leaf Spring have a Higher Capacity than an Identical Longer Spring
    A lot goes into giving something its weight capacity. The springs have been designed and tested for 4,800 pound trailer axles, 2,400 pounds per spring. It is actually more difficult to flex a shorter piece of steel than a longer one so it makes sense that a shorter spring would have a higher capacity. As long as you can properly install the springs and they are appropriately rated for the trailer then it wouldn't be a problem.
    view full answer...
  • Leaf Spring Recommendation for a Trailer to Stiffen Up Suspension that has 3,500 lb Axles
    Regardless of the amount of leaves a leaf spring has if the capacity is the same between two of them they would both flex and bottom out the same. I would recommend you have your trailer and boat weighed so that you know whether or not you are overloading the trailer/leaf springs. You should note that going to a heavier spring won't necessarily give your trailer a higher weight rating, just a higher spring rating. For a higher rated spring you would want the part # SP-218275 as it has...
    view full answer...
  • Will Changing Leaf Springs and Equalizers Affect Alignment of Trailer
    If you are replacing just the leaf springs and equalizers the alignment shouldn't change at all. If you were also changing the hangers the potential for the alignment to change is greater since that's what the springs and equalizers mount to. Either way if you are concerned about the alignment changing you can take the trailer to an alignment shop and they'll be able to check and see if any adjustments are needed.
    view full answer...
  • What is Spring Rate of Trailer Leaf Spring # SP-218275
    So trailer leaf springs like the part # SP-218275 typically only flex about 1-1/2 inch when at capacity. So that means it takes 2,500 lbs for this spring to move 1-1/2 inches and spring rate is weight required to move spring 1 inch. That means it takes 1,675 lbs to move the spring 1 inch.
    view full answer...
  • How to Choose Correctly Rated Trailer Leaf Springs for Single Axle
    Ideally the leaf springs on your trailer simply match or just slightly exceed the weight capacity of the axle. Leaf springs that are rated too high compared to the trailer's weight can lead to a rougher ride on the road. The axle capacity should be stamped right on the unit itself or it may be on the trailer's main information tag located on the frame up towards the coupler. If your trailer typically has a loaded weight of around 4,500 pounds though, there's a good chance that the axle...
    view full answer...
  • Are the Leaf Springs the Same as in the Photos
    Yes, the 4-Leaf Double-Eye Spring part # SP-218275 that you see in the photos on the product page will be the exact same as the leaf spring you receive in the mail. This leaf spring is rated at 2,500 lbs and measures 25-1/4" from the center of the spring eye to the center of the spring eye. It comes with nylon bushings and has a solid steel construction. I have attached a review video for you as well.
    view full answer...
  • When Determining Axle Location on Trailer is Trailer Tongue Length Factored into Location
    When determining axle location on a trailer and using the 60/40 guideline you do include the length of the trailer that includes the tounge and coupler length. The center point of your equalizer hanger needs to be located where you will have 60 percent of the frame of the trailer in front of the center of the equalizer hanger and 40 percent behind the center of the equalizer hanger. For example, if the trailers frames length is 18 feet, then the center-line location for the equalizer...
    view full answer...
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