bing tracking image
  1. Trailer Leaf Spring Suspension
  2. Universal Group
  3. Camper
  4. Car Hauler
  5. Utility Trailer
  6. Leaf Springs
1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long

1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long

Item # SP-115275
Our Price: $30.04
Trailer Leaf Spring Suspension
Orders above $99 qualify for Free Shipping
Shipping Weight: 8 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 6,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Great Prices for the best trailer leaf spring suspension from Universal Group. 1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long part number SP-115275 can be ordered online at or call 1-800-940-8924 for expert service.
  • All Info
  • Reviews (60)
  • Q & A (0)
  • Photos
  • Why etrailer?

Universal Group Trailer Leaf Spring Suspension - SP-115275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf Springs
  • Double Eye Springs
  • 25-1/4 Inch Long
  • 6000 lbs
  • Universal Group

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 6,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride.


  • Leaf spring acts as part of your trailer's suspension system
    • Provides attachment point for your trailer's axle
  • Spring flexes 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
  • 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
  • Designed for use without bushings


  • Quantity: 1 leaf spring
  • Spring capacity: 3,000 lbs
  • Axle capacity: 6,000 lbs
  • Length from center of spring eye to center of spring eye (unloaded): 25-1/4"
  • Spring width: 1-3/4"
  • Eye diameter: 0.59"
    • Compatible with 9/16" bolts
  • Leaf thickness: 7/8"
  • Number of leaves: 1
  • 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-115 Universal Group Double Eye Trailer Leaf Spring - 1 Leaf - 3,000-lb Capacity

Replaces TE30

Customer Satisfaction Score:

Customer Reviews

1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long - SP-115275

Average Customer Rating:  4.8 out of 5 stars   (60 Customer Reviews)

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 6,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride.


Perfect replacements for rebuilding the suspension on by boat trailer! Excellent quality parts very well made with exact fit!

This is my first time using etrailer but it certainly will not be the last!!


The springs that etrailer sent fixed my trailer. The old springs were so bad that the axels and tires weren’t tracking properly. Thanks to etrailer that’s no more a problem


The springs themselves look great even though they were made in China but I expected that they would have bushings already installed in the eyes of them.


The products appear to be ok. I would give the products 4 out of 5 stars. The 2 star rating is because of the poor shipping.

I ordered 2 leaf springs, 2 spindle nuts and 3 spindle washers. The first box showed up quickly (3 days) but it only contained 1 leaf spring. I called etrailer and they shipped a second leaf spring. After 5 days the package was at my local UPS distribution center but the tracking info said the package had been damaged and ups was contacting the shipper. I found out from ups that the spring had come out of the box, and they did not know who to deliver the spring to. I called etrailer again to discuss the damaged package but etrailer would not ship another spring until the damaged box/loose spring mystery was solved. Another week passed. I finally got the second leaf spring today, but it took about 3 weeks from the initial order date.


The 6k monoleaf springs were installed with no problems and have performed satisfactorily with 7k axles.

They have been loaded to approx 75% capacity several times




Put these on my 6x12 carpentry trailer that weighs 4000 pounds loaded.
A little stiff but I’m confident these won’t snap like the last ones.


Fantastic. Trailer rides MUCH better now with the new springs. eTrailer had them to my door FAST and customer services is top notch. You won't find a better price anywhere. I run these on a triple axle boat trailer that is both wide and heavy and they do great. The mono springs are great on saltwater boat trailers so you don't get corrosion trapped between the springs.


I recently broke a spring on my equipment trailer. Multi leaf springs are readily available but single leaf for mobile home axles are not. I was happy to find it available at "etrailer". It was delivered in the three days promised and I'm back in business.


Don't use my trailer much but so far the springs have been good.

Used my trailer several times and that was why my trailer was bouncing up and down. The new springs have solved the problem and are still working good!
Steven M - 10/27/2019


Thank you very much! Not a common spring. New spring was exact fit. Springs arrived on Fri, trailer back in service Sat. Will be purchasing more to restore rest of suspension. Nice to have "One-Stop-Shop" for all trailer needs.


I appreciate the email, the leaf springs are good, needed them to move a trailer about 45 miles to where it currently resides. I dont have time to fill out review BUT will be sure to use yiu in the future now that I know you are so into customer service that yiu follow up with people a YEAR later. That s great. Thanks


Bruce Manning Great Springs lifted my trailer 4 inches


I ordered leaf springs on Sunday and had them delivered ground and I received the following Wednesday. I received them in good condition. I will be ordering all of my trailer needs from etrailer. Thanks for the speed and accuracy of delivery.


Very good products and very me THX.

muy bueno and very fix products to me
Antonio - 05/15/2020


Webpages were easy to locate the part that I was needing. Check out fast and also easy to navigate.
The leaf springs I ordered arrived in less than two days.
Appreciate the prompt service


WOW, Can't believe it's been 1 yr. already! So far these have worked out great but I don't tow very often. It's great just having a single leaf there is no rust issues. These fit perfectly & were very easy to install. I would buy again!


etrailer is great to work with, have been using them for over 2 years. Products are always as advertised and I have yet to make a return


Just what I needed, when I needed it! The fellow who filled my order noticed I chose an errant mailing choice that would have delayed it...updated me for faster delivery and no extra charge! Keep up the good work, folks!


Just installed today. It was a perfect fit. It replaced a broken one on our water trailer.


Love the single leaf. These last and don't fall apart like the multileaf and allow for a lower trailer. For my use they work great thanks


The product was exactly as described fit perfectly shipping was very reasonable and arrived exactly when they said it would I would recommend doing business with this company again


Have not used products yet but the information found on the website is very helpful and shipping is outstanding.


This is the exact match for my application. Thank you guys for shipping it so fast. 3 days WOW!!!


One year later still working as it should. The surface finish has held up well. Happy I made this choice in product.
Camren - 03/04/2022

Show More Reviews

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

  • Does the Leaf Spring # SP-115275 Require a Bushing
    The # SP-115275 spring is designed to be used without a bushing and is normally a replacement for springs on a mobile home axle. The spring eye measures 9/16 of an inch across. We don't have any bushings that would fit this spring nor would there be any need for one.
    view full answer...
  • Leaf Springs Options For Electric Vehicle
    You want to choose the springs based on the weight capacity and fit. Since you are building this, the length of the spring would be open if you have the room. Slipper springs usually have a greater weight capacity but they will tend to ride a little stiffer than double-eye springs. I have attached a link to our product page for the suspension items we offer that you can check out. You said you were considering a single leaf spring. The single-leaf spring we offer that is 1-3/4 inch...
    view full answer...
  • Is There Potential Problems by Placing Shackle Straps in Front of Axle Instead of Rear Axle
    As long as your shackle straps are not elongated, bent or rusted you can place them in front of your axle. It's always a good idea to check shackle straps frequently because they are the part that will wear the most. If you need to replace, you will measure the shackle from center of one eye to the center of the other eye. I included a helpful article and video review for you too.
    view full answer...
  • How to Measure a Trailer Leaf Spring to Pick Out Correct Replacement
    If you are trying to measure your current leaf springs so that you can pick out the correct replacement ones you will want to measure from the center of the eye to the center of the other eye. Typically springs will flatten out over time (around 1/2 inch), so you will want to pick a spring that is slightly shorter than what your current spring is. The amount of leaves isn't as important as picking out one the correct length and capacity. I attached a help article on trailer suspension...
    view full answer...
  • Typical Spring Deflection for Trailer Leaf Springs When at Weight Capacity
    Typical spring deflection is up to 1-1/2 inches when at capacity. So the # SP-115275 that you referenced should see right at 1-1/2 inches of deflection when it has 3,000 lbs on it. I attached a review video for this spring as well.
    view full answer...
  • Should Trailer Suspension Shackle Straps Mount Below or Above the Equalizer
    Having the shackles below the equalizer would put the leaf spring out of level. Also, the equalizer wouldn't want to function properly and most likely the shackle would end up flipping over to the top of it or binding up/putting undue stress on the leaf spring/shackle/equalizer. You would definitely want to have the shackles mounted above the equalizer. Check out the help article I attached on trailer suspension as well.
    view full answer...
  • Recommended Replacement 2-Inch-Wide Leaf Spring on Old Utility Trailer
    Thank you for providing the detailed description of your broken 4-leaf spring. If the spring is 2-inches wide as you state then it is likely to be a single-eye slipper-type spring such as those shown on the included link. If the spring has an eye on both ends then it is a double-eye spring whose width is probably 1-3/4-inches rather than 2-inches. We do not offer any double-eye leaf springs in the 2-inch width (although rare they do exist). We offer only a 1-3/4-inch width as those shown...
    view full answer...
  • How To Measure Trailer Leaf Springs To Find Replacement
    You are not able to add a leaf to any of the existing springs you have to increase the capacity you want to carry. My recommendation is to install new springs to be able to handle the added weight. You will need to take some measurements to make sure you get the right system. You will want to measure the distance center-of-spring hole to center-of-spring hole. I have attached a photo that shows where the dimensions are taken for a leaf spring. You want to make sure the entire system...
    view full answer...
    Image 1 for
  • Replacement 1 Leaf Springs For 5 x 8 Utility Trailer
    The only 1 leaf, 1-3/4 inch wide leaf spring we offer is # SP-115275. This spring sounds like it might be a fit for your trailer. It is a single leaf double eye spring that measures 25-1/4 inches long from center of eye to center of eye. This spring is designed for use with 6,000 pound trailer axles. The part # SP-115275 includes one spring. We recommend replacing springs on both sides of the trailer at the same time. There may be a label on the axle that will give you the weight capacity...
    view full answer...
  • Raising the Height of a Tandem Axle Boat Trailer with Leaf Springs Mounted on Top of the Axles
    Since the leaf spring stack is already on top of the axle on your boat trailer you can raise the height by having taller hangers welded on. I have included a link to our trailer suspension hanger main page for you. Most trailer hangers need to be welded on. Welding should be done by a professional welder. Another option is to use taller tires on the trailer provided that there is enough clearance above the existing tires to go to a size larger enough to fit your needs.
    view full answer...
  • Replacement Double-Eye Leaf Springs for DHM Boat Trailer
    We can help you with replacement double-eye trailer leaf springs. Do note that you always want to replace leaf springs in pairs. This is because a new spring will have a slightly different length (it will be a little shorter) than the old one; this is due to the normal elongation of the spring that happens from years of use. If you replace only one spring you can run into axle alignment issues that can affect trailer tracking and tire wear as you go down the road. Always replace both leaf...
    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 # e27SR 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.
    view full answer...
  • 6k Rated Double Eye Leaf Spring Recommendation for Trailer
    The most common leaf spring length for trailer is 25-1/4 inches. The best recommendation I can make is the part # SP-115275 which is 25-1/4 inches long and is for 6k rated axles. You may need to move the hangers on your trailer to get these to fit, but you should note that trailer leaf springs have a tendency to stretch around 3/4 of an inch over time.
    view full answer...
  • 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...
    view full answer...
  • Leaf Spring Replacement Recommendation for a Trailer with 6000 lb Axles
    The Double-Eye Spring # SP-115275 that you referenced would work well for you. I did a little research and found that with your distance of 29-1/2 inches the # SP-115275 would be the perfect length once you factor in the distance that the equalizers take up. These springs are also designed to work with 6,000 lb axles so this would be perfect for you. I am a little concerned about the GVW of your trailer being 13,180 lbs when you have 2 6,000 lb axles on your trailer. I would strongly recommend...
    view full answer...
  • Replacing 5-Leaf Spring with 1-Leaf Double-Eye Spring on Boat Trailer with Tandem 6,000-lb Axles
    The single leaf spring you referenced, part # SP-115275, would work fine as a replacement for the 5-leaf springs you currently have. You are correct in stating that corrosion would be less of an issue with this particular spring. Make sure to replace the leaf springs in pairs by axle.
    view full answer...
  • Are Bushings Needed for the 1 Leaf Trailer Leaf Spring # SP-115275
    The # SP-115275 spring is designed to be used without a bushing and is normally a replacement for springs on a mobile home axle. The 9/16 inch bolt will be a bit loose in this type of spring that is used without a bushing.
    view full answer...
  • How to Determine the Correct Double Eye Leaf Springs For Replacement
    When replacing the leaf springs on your trailer you will need to match all of the dimensions and the spring capacity as closely as possible to the original spring. See the picture to the right for the locations of the measurements, (A) and (B) in the following paragraphs. If your trailer has a axle capacity of 6,000 pounds and the center to center measurement of the spring eyes is 24-1/4 inches, and the measurement from the center of the spring to the center of the front spring eye is...
    view full answer...
    Image 1 for
  • How to Pick Leaf Springs for a Trailer
    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 and then pick a leaf spring with the same weight capacity of your trailer axles and is slightly shorter (around 1 inch) to compensate for the sag and wear of the old leaf spring. Leaf springs...
    view full answer...
  • Is Double-Eye Spring for 6,000-lb Trailer Axles # SP-115275 Designed for Short or Long Term Use
    The 1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles # SP-115275 that you referenced is not considered a one-time use leaf spring and would last a long time. While there isn't an exact mileage or age figure these springs were designed for they were made to last as long as possible.
    view full answer...
    Image 1 for
  • Can Leaf Spring Part # SP-115275 Be Mounted Above and Below Trailer Axle
    Our trailer leaf springs like the 1-leaf part # SP-115275 that you referenced can mount on top of or below trailer axles.
    view full answer...
  • Replacement Leaf Springs Compatible With 10,500 lb Rated Cattle Trailer
    The Universal Group 1-Leaf Double-Eye Spring for 6,000-lb Trailer Axles - 25-1/4" Long # SP-115275 is a replacement spring for an axle of up to 6,000 lb total capacity. Each spring is rated for up to 3,000 lbs. If you have tandem axles on your trailer, then these springs will work well for your weight limits. If you have more questions, please let me know.
    view full answer...
  • Leaf Spring Replacement For 26 Inch Measurement Eye to Eye With 4 Leafs
    For a set of leaf springs that would fit your trailer you would want the part # SP-115275. These are 25-1/4 inches from eye center to center which should work well as a replacement for your 26 inch long ones. Yes, sometimes it is good to allow for slight variations in this measurement because the springs can sag and elongate as a result of wear. These answers are based off of a trailer with a 6000 pound axle. If your axle has a different capacity let me know and I can make different recommendations. Your...
    view full answer...
  • 6,000 Pound 1 Leaf Replacement Double Eye Trailer Spring
    The closest spring we have to that is part # SP-115275 which is a 6,000 pound 1-leaf spring but it measures 25-1/4 inches long. If your 26 inch spring is old and flattened out then there's a good chance part # SP-115275 is what you need because your old one will be longer than a new one.
    view full answer...

< Previous

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 Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Jacob T
Video Edited:
Jacob T
Employee Cole B
Installed by:
Cole B
Employee Kevin C
Installed by:
Kevin C
Employee Wilson B
Updated by:
Wilson B
Employee Hannah L
Updated by:
Hannah L
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.