Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,500-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 suspension from Universal Group. 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long part number SP-210275 can be ordered online at or call 800-298-8924 for expert service.
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Trailer Suspension > Leaf Springs > For Double Eye Springs > For 1-3/4 Inch Wide Spring > 3500 lbs > 4 Leaf > 27 Inch Long > Universal Group

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Video Demo Universal Group Trailer Suspension SP 210275

Universal Group Trailer Suspension SP-210275 Review

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long

Universal Group Trailer Suspension

(13 reviews)

Code:   SP-210275



Shipping Special

Shipping Weight: 14 pounds


Universal Group Trailer Suspension - SP-210275

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,500-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: 1,750 lbs
  • Axle capacity: 3,500 lbs
  • Length from center of spring eye to center of spring eye: 27"
  • 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-210 Universal Group Double Eye Trailer Leaf Spring - 4 Leaf - 1,750-lb Capacity

Replaces PR427

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Video of 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" 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 SP-210275 Review

Today we're going to take a look at the 4-leaf double-eye spring for 3,500-pound trailer axles. This spring is designed to flex to absorb road shock and provide a nice smooth ride. It will help reduce wear and tear on your trailer. It helps you enjoy a level ride on bumpy and uneven surfaces and it mounts to your trailer frame with hangers or a hanger kit which we do sell separately on our website. Lots of times they are listed on this product page as a related product. It does include the nylon bushings in the eyes. A few specs on this.

The spring capacity is 1,750 pounds. It is designed to be used on axles with 3,500-pound rating. When you use this with one on the other side it will meet your 3,500-pound rating. This is for a quantity of one spring. It does have the four leafs as you can see, one, two, three, four.

I do want to give you a few measurements on this. We're going to do the spring length which is measured from the center of this busing to the center of this busing. You can see center-to-center is going to be right at 27 inches. We're going to do the width of it and the width is going to be right at 1-3/4 inches wide. The diameter of the eyes on each end is 9/16 of an inch. I just want to know we do want to recommend is that to ensure proper axle alignment and suspension performance, you do usually want to replace your leaf springs in pairs.

That should do it for the review on the 4-leaf double-eye spring for 3,500-pound trailer axles.

Customer Reviews

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long - SP-210275

Average Customer Rating:  4.8 out of 5 stars   (13 Customer Reviews)

Double-eye leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,500-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushings with 9/16" inner diameter.

- SP-210275

by: afwilliams08/21/2016

I completed construction of a mobile bandsaw mill and found the springs on the mobile home axle I used were much to strong. I believe they were rated for 6,000 pounds and did not flex with the light load of the bandsaw mill. The SP-210275 were a perfect fit for my need. Shipping was very quick and other than needing to purchase longer "U" bolts, I was able to simply remove the old springs and bolt the new springs right into place. Very satisfied with this purchase and installation. 286207

- SP-210275

by: Rich H.09/11/2016

Purchased double eye 27" 4 leaf spring as a replacement on double axel boat trailer. Product matched description, affordable. Great customer service. Arrived early. Would be nice if bottom leaf was extended width, to incorporate thru holes for U-Bolts to mount the springs to the axel. 293612

- SP-210275

by: Bill h08/07/2016

With the outstanding help from Tommy at, I was able to purchase the right axle, hubs, spring and tires the first time. Everything arrived in good condition, went together like a dream. I was impressed with the quality of product and service. 281111

- SP-210275

by: Kelly Vanlandingham07/25/2016

Thie leaf springs and bolts were delivered as ordered. My trailer is homemade, so getting everything to work was difficult through no fault of this product. The bolts are hard to tighten as they have sprockets at the head. Due to the way the trailer was built we had to improvise and go to local Autozone to buy 7-inch long u-bolts and plates. So, the only thing different that I would have done would have been to order the u-bolts from 275884

- SP-210275

by: Gary C07/23/2016

I have been ordering parts from etrailer for my 5th wheel travel trailer for years. I goofed on this order and ordered the wrong leaf springs to replace a broken one. I immediately reordered the correct ones as soon as I discovered the mistake. I have always been satisfied with the products I have received from etrailer and know I will receive a quality product from them. I will repost when I receive the proper springs and install them. 275353

- SP-210275

by: ray s09/17/2016

the trailer springs I ordered arrived much sooner than expected. they look great on my 40 year old home made trailer. If they last as long as the old original springs did I will be long dead but happy with your product. by the way a picture would not be pretty except for the new leaf springs. Thanks for the speedy shipping and a really great price!! 295985

- SP-210275

by: Lee10/16/2016

Etrailer went above and beyond for customer satisfaction. Not only did I get the correct parts, but they shipped them faster than anticipated. A huge thank you, now I can make up time in my busy schedule to complete my project! 307710

- SP-210275

by: Travis R10/17/2016

Product was as discribed. I bought this leaf spring in a bind to get a trailer home with hay on it. I was a little disappointed to see it was made in China but I guess every thing is now a days. 307838

- SP-210275

by: Sean B.09/18/2016

Perfect fit. You just about can't get the wrong part from e-trailer...their site is so informative! Love to buy parts from them! 296116

- SP-210275

by: David s09/13/2016

Great service and the best pricing ive found I would highly recommend etrailer for all you mech and cosmetic needs 294082

- SP-210275

by: marty09/10/2016

very happy with the prompt delivery !!! !! 293375

- SP-210275

by: Rick W.08/03/2016

Awesome products Awesome Customer Ser vice 279078

- SP-210275

by: D08/05/2016

All good! 279924


Ask the Experts about this Universal Group Trailer Suspension

  • Recommended Replacement Leaf Springs for Ranger Boat Trailer with 3000-lb Axles
  • It is tough to get a correct eye-to-eye measurement on a double-eye leaf spring when the spring is still installed in the suspension. It is much better to measure for a replacement leaf spring by removing it first. Also, if a spring is very old and well-worn it can actually become longer than it was when new. Years of use can cause a leaf spring to elongate by as much as 1/2 to 3/4-inch. In a 1-3/4-inch wide double-eye spring rated for a 3500-lb axle, we offer the 4-leaf # SP-210275...
    view full answer...

  • Recommended Leaf Spring For 1,200 Lb Boat Trailer
  • The longest leaf springs we offer are the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles, part # SP-210275. These springs measure 27 inches eye-to-eye and are designed for axles up to 3,500 lbs. I have attached a photo of this spring that has the dimensions noted you can check out. When measuring the springs, the weight has to be removed from the springs. The leaf springs I recommend for your trailer are part # SP-169275. This spring is designed to work with a 2,000 lb axle....
    view full answer...

  • Picking Out Trailer Leaf Springs for Trailer with 30 inches between Hangers
  • To pick out the correct suspension components for a trailer you want to do it by most importantly picking out the springs that closely match the capacity of the axle capacity needed. That is priority one. For example if you were using the springs part # 1020, # PR722, # SP-111275, # SP-218275, # SP-115275, or # SP-220275 with the hanger kit part # APT5 that comes with equalizers that are 7-3/4 inches long you would want the hanger spacing to be 29-1/2 inches which is pretty close to...
    view full answer...

  • How to Pick Out Replacement Leaf Springs for a 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...

  • Recommended Suspension Parts Needed To Build A Smoker Trailer
  • Looks like you have quite a project going here. After consulting with other Experts, the first thing I would recommend is a new axle for your trailer frame. It appears the axle you have was originally used on a car and welded to the trailer. I could not recommend any suspension that could safely be used with the axle in your photos. I have attached a help article that explains how to determine the correct axle position. The next thing to consider is that you will have to build your...
    view full answer...

  • Replacement Trailer Suspension For 1971 Aristocrat Starliner Travel Trailer
  • We can help you with finding what you need to replace the trailer suspension on your 71 Aristocrat. Many times there is a plate or sticker on the axle somewhere or on the trailer that has the weight capacity and size of axle you need. That would be the easy part. If you do not have the plate or sticker or manual for the trailer you may need to take some measurements of the suspension you currently have installed. You will need to know the weight of the trailer to make sure you have...
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  • Replacement Leaf Spring Recommendation for a 3,500 lb Dexter Axle
  • From the info I was able to find on the number you listed you do have a Dexter 3,500 lb axle so for a leaf spring you would want the # SP-212275 for if you need a 25-1/8 inch spring or # SP-210275 if you need a 27 inch leaf spring.
    view full answer...

  • Recommended Replacement 3,500 Lb Axle With Brakes For Trailer
  • I recommend an axle like part # 35545E-ST-EZ-89. This axle has a distance of 89 inches hub-face-to-hub-face and a spring center-to-center measurement of 74 inches. The brake flange-to-flange distance is 82-5/8 inches. The axle has 10 inch x 2-1/4 inch brake drum dimensions and a 5 on 4-1/2 inch wheel bolt pattern. This will accommodate 13 to 15 inch diameter wheels. Based on the measurements you provided, this will work well for you. This axle comes with brakes, hubs, drums, bearings,...
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  • Availability of Double-Eye Leaf Spring with 30-Inch Eye-to-Eye Measurement
  • The double-eye leaf springs we offer are all 1-3/4-inches wide and are available in lengths from 20-1/4-inches for 2000-lb axles up to 27-inches for 3500-lb axles, part # SP-210275. Please see the included link. Slipper type springs (with a single eye) are offered in lengths of 30-inches and higher and these are intended for 9000-lb and higher axles. A link to all slipper springs is included for you as well. Do note that a very well-worn spring can become slightly elongated from use....
    view full answer...

  • Replacement Leaf Spring For 1998 Boat Trailer Carrying 18-Ft Bass Boat
  • The best fit when replacing leaf springs on a trailer is to know what the trailer and axle capacity is. There may be a plate or sticker that has that information listed. We offer one single leaf spring, part # SP-115275, and it is designed for 6,000 axles. It has a measurement of 25-1/4 inches eye center-to-center. If you are measuring the spring after it has been taken off the trailer it may have flattened a bit over time. As far as the leaves in the leaf spring, we may have one...
    view full answer...

  • How to Pick Out Leaf Springs for 2000 Fleetwood Toy Hauler SUT26A
  • You will want to 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 1/2 inch) to compensate for the sag and wear of the old leaf spring. Once you know the length you need check out the chart I attached that has all of the springs we carry. The lengths are in the column A.
    view full answer...

  • Replacement Springs for a Utility Trailer with 2,000 Pound Axle
  • The typical hanger spacing for a single axle trailer with 2,000 pound axle is 20 inches on center. Since your spacing is 29-1/2 inches you have a couple of options. First you could move either the front or rear hangers to get a spacing of 20 inches on center which will allow you to use a properly rated spring, # SP-169275. This will require having the existing hangers cut off and welded on by a professional welder. The other option is to use a longer spring, such as # SP-210275, which...
    view full answer...

  • Compatibility of Replacement Trailer Suspension Components
  • The parts you referenced are compatible with each other. Hanger Kit # APS1 works with 1-3/4-inch wide leaf springs like # SP-210275. U-Bolt kit # APUBR-1 fits your 2-3/8-inch axle as does Spring Seat # TRSS238. For reference I linked you to an article on trailer suspensions and to our main page for all trailer suspension components.
    view full answer...

  • Leaf Spring Recommendation for 3,500 lb Axle on Trailer for Converting from Slipper to Double Eye
  • Sounds like you are trying to convert your trailer from slipper springs to double-eye springs. This is possible but will require you to install new rear hangers for the rear eye of the spring to attach. You would need to go with a leaf spring that is rated for the weight of your trailer when it is loaded an ready to go. The closest leaf spring we have in terms of dimensions that is for a 3,500 lb axle is the part # SP-210275. This spring is 27 inches long. For the price an convenience...
    view full answer...


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Information for this part was:

Installed by:
Jeff D
Expert Research:
Jameson C
Written by:
Alexander C
Photos by:
Stacy F

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Info for this part was:

Installed by:
Jeff D

Expert Research:
Jameson C

Written by:
Alexander C

Photos by:
Stacy F

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.

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