bing tracking image
  1. Trailer Leaf Spring Suspension
  2. Universal Group
  3. Camper
  4. Car Hauler
  5. Utility Trailer
  6. Leaf Springs
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
Our Price: $81.17
Trailer Leaf Spring Suspension
Orders above $99 qualify for Free Shipping
Shipping Weight: 13 lbs
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images

Customer Photos

Need help with installation?
Locate installers near me
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. Great 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 or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (312)
  • Q & A (0)
  • Photos
  • Why etrailer?

Universal Group Trailer Leaf Spring Suspension - SP-051275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf 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.


  • 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


  • 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 (unloaded): 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

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

Customer Satisfaction Score:

Customer Reviews

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

Average Customer Rating:  4.8 out of 5 stars   (312 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.


I upgraded from a single leaf 3500lb axle spring to a 4 leaf 4000lb axle spring and also upgraded the U-bolts. The upgrade went very well. Everything fit perfect. The trailer tire to fender clearance was only 1.5 inches (at best) before the upgrade, now it is 3.5 inches. This will help the tire from rubbing the fender on the rough and bumpy road that we have in the state.


I was getting more trailer sway than normal. Leaf springs definitely need to be replaced.


These are good, they are not made here, the plastic bushings push right out and the wet bolt bushings went right in...

Everything is working great, I noticed later that my wheels are not straight and my axles are not aligned, so Im dealing with that, I know that theirs kits out there, but to get your wheel straight is another problem thats that I am not sure what is a safe way to fix. Thanks to everyone at etrailer and MORryide for all the help.
David - 08/14/2022


They do exactly what they are supposed to do....what more needs to be said? I bought these because the old springs on my travel trailer had flattened out to the point that my tires would hit the trailer body in the top of the wheel well when flexing, such as when pulling into driveways. The new springs gave me the clearance to eliminate that problem, and are a little heavier duty than the old ones as well. Installation was very straightforward, and not too difficult for this 70-year-old guy, requiring just basic hand tools.

The springs are still doing the job, although we havent been travelling as much as we planned, primarily due to the ridiculously high fuel prices this summer.
Chuck J - 08/07/2022


Using 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.


Great replacement springs, I ordered brackets also. Cut all bolts with grinder and new ones went in like a charm. Didn't realize how bad the old ones were. Nice and easy upgrade.


I had a broken spring on the road and had it replaced. I considered replacing only the other three. I decided to do all four to keep everything the same. I'm glad I did. I replaced the plastic bushings with the bronze ones and grease-able bolts that came with the pivot kit I bought. There were only pieces of the original bushes left in the old springs. I had not realized how over the years my trailer had sagged. Now it's like new again. NOTE** Make sure to press the bushings in, a bench vice works fine, and do not use a hammer. They are bronze, not steel, and can be ruined. ( Just some sound advice from a 68 year old professional).

These springe are holding up as I would expect. My trailer tows fine and halls very well.
R. W - 08/09/2021


E trailer website accurately describes product and items were delivered quickly and with all parts ordered. Very satisfied with the service we received!


i over sized the springs now i have more tire clearance. great


in big bold letters....CHINA.....if i knew these springs came from china...i would not have bought i bought a pair for another project 5 yrs ago and within 1 year they were squatting as bad as the 30 yr old oem springs....nothing agents etrailer..good co...just trying to stat afloat......


I replaced the springs on my boat trailer, I bought all new springs and hardware. Everything worked great. These springs raised the trailer about 4 inches. The old springs were so worn out that the wheels were starting to hit the underside of the fender on bumps. They were a perfit fit and now i am not worried about the trailer riding too low.


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.


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.


I order for my 2007 crossroads Cruiser 5th wheel. a set off 4 leaf springs And brakes all around everything fits perfect.


My old springs were flat after the 5th wheel sitting on them for 16 years. These raised the unit about 2 inches


Awesome product and price, highly recom mend.

They are already starting to Sag and I have less than a thousand miles on my trailer
Brett K - 10/06/2021


Great springs, easy install. Very good products and great service as usual, thanks

still great and going strong
Robert R - 03/17/2022


Just what I needed


They fit just right!!!


Great product, Great Customer service, delivery as promised


A good price and perfect replacement for my 2015 Puma Toyhauler. I would suggest upgrading the shackle hardware though. Everything on my camper's suspension is heavily worn and not the highest of quality. And if you're going to replace one, replace them all....


Correct part per the description on the site. Easy to install.


The boat trailer leaf springs arrived earlier than expected and they fit perfectly. Etrailer was the only place that had this spring in stock. I tried 3 springs locally that didn’t fit. After a lot of hard work I ordered the correct size and got them on. After four springs, on and off, I’m a pro now!!! Thanhs so much for having the correct size and being very nice when I called to verify the size! Pull trailer after the installation, and I couldn’t be happier!


Looks good. I really appreciate your videos. I just wish they weren't made in China.


Very nice quality heavy duty springs. They’re on a custom built trailer, so I was relying on the accuracy of the published specs to select a replacement set of springs. The spec data was right on as these bolted up directly with no issue.

Show More Reviews

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

  • 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 # e27SR. 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...
  • How To Find Correct Replacement Leaf Springs for Grand Design Momentum 351M
    I don't have information specific to this trailer about leaf spring durability so about the only thing we can really help with here is getting you setup with the info you need to choose the correct replacements. The first bit of info you need to obtain is the axle capacity from the axle tag on the center of the beam. Then you will need to jack the trailer up in the air and measure the leaf springs from eye to eye. Once you have this info you can then filter through our leaf spring selection...
    view full answer...
  • How To Measure Double-Eye and Slipper Leaf Springs for Replacements
    In order to know what replacement leaf springs you need, there is no way we can identify the springs just by the year and VIN. The only way to confirm what springs you need, we need to know what type of leaf springs you have: double-eye or slipper springs. If you have double eye springs, here is the information we need: - number of leaves needed - axle weight rating - length of center eye to center eye - length of center eye to the center of the spring - height - leaf spring capacity I...
    view full answer...
    Image 1 for
  • How To Find Correct Replacement Leaf Springs for Homesteader Challenger Enclosed Trailer
    The first bit of info you need to obtain to find the correct replacement leaf springs for a trailer is the axle capacity from the axle tag on the center of the beam. Then you will need to jack the trailer up in the air and measure the leaf springs from eye to eye. Once you have this info you can then filter through our leaf spring selection attached below. The 4-Leaf Double-Eye Spring part # SP-051275 for example is for 4,000 lb axles and measures 26" long. Please note, new leaf springs...
    view full answer...
  • How To Find Correct Replacement Trailer Leaf Spring for Dexter D-40 Trailer Axle
    In order to find the correct leaf springs for a Dexter D-40 Axle you'll need to measure their unloaded length and keep in mind as the springs age/wear, they will stretch so the replacements are likely shorter. I don't know what length springs this specific axle uses but once you measure, you can filter our selection below by both weight and length. The 4-Leaf Double-Eye Spring part # SP-051275 for example measures 26" long (eye to eye) and has a 4,000 lb weight capacity (per axle).
    view full answer...
  • Replacement Leaf Springs for 1999 ProCraft Boat Trailer With 3,750 Pound Axle
    Thank you for providing that helpful information. Based on your measurement and the 3,750 lb axle rating I recommend the 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # SP-051275. These leaf springs are slightly shorter but that won't be an issue. Leaf springs will become longer as they wear out, so a replacement will be shorter than your current measurement. It is worth noting that leaf count doesn't matter. This is a 4-leaf spring but the important factor is the weight...
    view full answer...
  • How Do I Measure Leaf Springs in Order to Determine What Replacement I Need?
    When it comes to leaf springs, there are different ways to measure the springs whether you have double-eye springs or slipper springs. If you have double-eye springs like the # SP-051275, here is how you measure them: - length of center eye to center eye - length of center eye to the center of the spring If you have slipper springs like the # SP-232275, here is how you measure those: - length of center eye to end of spring slipper - length of center eye to highest slipper point I...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Leaf Spring Recommendation for 26" Long Leaf Spring on 3,750 lb Axle
    The 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles - 26" Long # SP-051275 is a good replacement for your boat trailer as it meets all of the specs and is compatible with an axle that's just a little higher when it comes to weight rating. Please note that what you do to one side of the axle you need to do to the other so you'll need 2 of these leaf springs. Attached is a review video for you to check out.
    view full answer...
  • Can Bushing of Leaf Spring # e27SR be Replaced for Use with 1/2 inch Bolt
    You could swap out the bushings of the leaf spring # e27SR with the part # TRBU11506 and it would have correct inner diameter for a 1/2 inch bolt.
    view full answer...
  • Recommended Replacement for Dexter Trailer Leaf Spring 072-099-00 and U-Bolts 011-017-01
    The closest match we have for a Dexter Trailer Leaf Spring 072-099-00 is the 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles part # SP-051275 which will be an exact fit. The only difference being a slightly higher capacity of 4,000 lbs compared to the 3,000 lb rating of the existing. Please note, the leave count difference won't affect fit or function. The for the Dexter U-Bolts 011-017-01 you cab replace these with the U-Bolt Kit for Mounting 5,200-lb to 7,000-lb, Round Trailer Axles...
    view full answer...
  • Replacement 26 Inch Long Double Eye Leaf Spring for Travel Trailer
    The 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles # SP-051275 looks to be exactly what you need. This measures 26" from center eye to center eye and is 1-3/4" wide. This is rated for 2,000 lbs so when you replace both springs together they are rated for 4,000 lbs (check to make sure this is rated high enough for your axle specs). Be sure to replace the leaf spring on both sides of the same axle to ensure that you have a consistent ride quality.
    view full answer...
  • Recommended 26" Long Double Eye Leaf Spring for 4K Axle
    The 6-Leaf Double-Eye Spring for 4,500-lb Trailer Axles part # SP-256275 seems to fit the bill for your trailer. It measures 26" long unloaded and has a 4,500 lb capacity for the pair. It has six leaves but the number of leaves is not necessarily important for replacement as the leave thickness can vary, just be sure the weight capacity is sufficient for the trailer. For new equalizers, shackle straps, and shoulder bolts we have a complete kit for this, the Dexter Heavy-Duty Suspension...
    view full answer...
  • Replacement Leaf Springs and MORryde CRE3000 for 2021 Coachmen Freedom Express 292BHDSLE
    What is the length of your current springs? Also what is the wheelbase distance between your trailer axles? With that info I can see what components you'd need.
    view full answer...
  • Recommended Leaf Spring Replacement For A 2019 Dutchmen Kodiak Ultra-Lite 283BHSL
    Definitely looks like the springs are being overloaded and need to be replaced. You can use higher rated leaf springs but, the higher you go the stiffer the ride will be. Since we know the weight class with your axles the next step would be to measure from eyelet to eyelet to figure out the correct length. With the leaf spring being flat it's going to measure a bit longer than it typically would so we would just need to find something close to the measurement. At 4,000lbs we have a...
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Replacement U-Bolt Kit, Leaf Springs, Bolts and Shackles for 68 Aristocrat Lo Liner Trailer
    Installing the U-bolts and plate like that would be fine, but I would recommend putting the plate on the leaf springs and running the U-bolts around the axle instead. The good news is you're replacing them so you can make that change when you install them. Once you have your axle measurements we do have some kits you could use. If it is a 2" square axle the # CE23103 or for a 1-1/2" square axle the # CE23102. If it is 1-3/4" you will need the # 175130 along with the # 116308. Since you...
    view full answer...
    Image 1 for
  • How to Choose Correct Replacement Leaf Springs and Equalizers for a 2021 Coachmen 259FKDS
    The determine the correct replacement leaf spring on your 2021 Coachmen 259FKDS you'll need to lift your trailer frame so the spring is hanging freely and then measure from center-eye to center-eye, then for the equalizer you need to measure center-eye to center-eye for the horizontal bolts and then from the center of the top eye to the centerline of the horizontal eyes. Be sure to also note your axle weight rating as well. I'm attaching dimensional photos from the Leaf Spring # SP-051275...
    view full answer...
    Image 1 for Image 2 for Image 3 for Image 4 for Image 5 for

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

  • Why

    At we guarantee:
  • Real product know-how.

    We make sure that the products we sell are what we say they are, and that they work the way they are supposed to work. Get real advice from a real person who has the knowledge and expertise needed to solve your problem.
  • Most detailed, accurate trailer leaf spring suspension information available.

    Because we take providing accurate product information seriously, we take our own detailed product photos, demo videos and installation videos, as well as verify measurements, instructions, and vehicle fit information.
  • Installations, made easy.

    We love helping people and have the most highly-trained customer service, hands-on experience, step by step videos and installation instructions.
  • Fast shipping.

    Your order is automatically routed to get out of our warehouse and to your door as quickly as possible. Receive free shipping on orders over $99.
  • Personalized service for life.

    We provide one-on-one, personalized service from the ordering process through the life of your product.
  • Trusted since 1946.

    We've been serving customers since our parts store first opened in 1946 and continue to be recognized by our customers, our vendors and third parties for exceptional service.
  • Returns Policy

    Need to return an item? No problem. Please read our Returns Policy for more information.

Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Michael H
Expert Research:
Michael H
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jeff D
Installed by:
Jeff D
Employee Kevin C
Installed by:
Kevin C
Employee Jacob T
Video Edited:
Jacob T
Employee Wilson B
Updated by:
Wilson B
Employee Manda E
Updated by:
Manda E
Employee Alexander C
Written by:
Alexander C
Employee Thomas T
Video by:
Thomas T

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924