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  1. Trailer Leaf Spring Suspension
  2. Universal Group
  3. Leaf Springs
  4. Springs
  5. Double Eye Springs
  6. 27 Inch Long
4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long

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

Item # SP-210275
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Trailer Leaf Spring Suspension
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Universal Group Springs - SP-210275
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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 leaf spring 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 1-800-940-8924 for expert service.
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Universal Group Trailer Leaf Spring Suspension - SP-210275

  • Leaf Springs
  • Springs
  • Double Eye Springs
  • 27 Inch Long
  • 3500 lbs
  • Universal Group

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

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   (184 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.


etrailer is a fantastic company and responds to customer service questions within a day, in my experience with them. They worked hard to advance an arrival of this item I needed in a hurry, for which I am very grateful. We would have missed a camping trip without their help. Kudos to George and Rachal at etrailer! You can count on them. Oh, and the springs were an exact fit in every way.


fixed my issues. trailer doesn't bottom out on big pot holes now and it rides smoother.

still in good shape. no rust yet
Ben - 06/10/2022


2500 miles in and the trailer is still smooth as the day I installed the new springs.


Parts fit as advertised, very satisfied with purchase. I new nothing about replacing a trailer axle info on web site and support provided were excellent.
Definitely would recommend etrailer


Having never replaced a leaf spring before I decided to go ahead and give it a shot on my own. I reviewed the information on and found the replacement parts without a problem. Once they arrived I removed the old worn leaf springs and replaced them without much trouble at all. Back to safe trailering. Thanks etrailer for the help.


The springs fit great however new hardware would have been nice.


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.


I purchased the 3000# axle springs and all mounting hardware to replace the old ones on my 1963 travel trailer. My trailer no longer leans to the left and goes down the road better than new. I should have done it many year ago. I received my package on time and installation was easy and fit perfect. Thanks Bridget


Great product! My first purchase from etrailer but it won't be my last! etrailer seems to have everything you would need for your RV or trailer. Waited until the last minute to pick up an extra leaf spring for my trip to Alaska. Fast shipping got it here in plenty of time. Thanks!


Easy installation dose what I need it to do.


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.


I discovered that I needed to fit the holes in the bottom of my axle onto the studs on the springs before tightening the hardware fastening the springs to the rear shackles and front hangers.


Hello,I would like to say I am very satisfied with shipping was fast, price was great,now I'm ready to go catch them bass .


Well, I just got the parts, so can't say anything reliable on chinese made parts.
The price was(is) Great! a boat load cheaper then the local store....humm.

springs fit perfectly, however, the springs I wanted are no longer being offered, could of had springs made but I went with the less$isMore theory. (more in my pocket)

The "white" nylon bushings I ordered would not fit into the equalizers, but the grey colored ones I had did fit perfectly, just a-hair difference in outer diameter.

The bolts fit perfectly as well.

It is always 10 times easier dealing with eTrailer then the local store, So I know eTrailer has put a lot of time into making it easy for their customers, Thanks!

Very Fast shipping, all at a price I can afford!


very happy


Great description of part. It was exactly what i needed. Arrived earlier than expected and i really appreciated being informed throughout the shipping process. This is my go to site from now on. Thank you very much.


Wow. I order something and it came. No the most exciting BUT it sure was nice the had the odd size I needed!


Leafsprings appears to be good. Changing from a 3 leaf spring to a 4 leaf spring but these are lighter in weight. Hoping they will handle the weight on my double 3500 lb axles. Extremely fast shipping. Box was tore up a good bit but it's hard to hurt Leafsprings. Will post again after they are mounted.


I needed to haul a Bridgeport mill on my utility trailer. The trailer was sound but I needed to upgrade the springs. These were a direct replacement.


Fit right on 27'centers.


These leaf springs fit well for my utility trailer.....I would recommend this product for anyone needing to replace broken leaf springs...


Looks great


holds the weight well


The price was right and shipping was fast, and the video on measuring made it easy to be sure I was ordering the right part for my trailer. What's not to like? The only mistake I made was in not ordering all the hardware (U-Bolt kit, shackle bolts, and shackle straps) all at the same time. Although the videos say these parts can be reused, mine were rusty enough that they were really hard to get apart and then back together, even though they were only a year old.


The leaf springs arrived and look excellent. The shipping and customer service has been top notch.

One note, the retention bolt on the bottom of each spring is slightly larger that the bolts were on the old springs (1964 Shasta travel trailer). Accordingly, I'll have to drill out the bolt hole on the axel leaf spring seat to accommodate the new bolt size. Otherwise, smooth sailing.

Show More Reviews

Ask the Experts about this Universal Group Trailer Leaf Spring Suspension

  • 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...
  • 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...
  • How Far Apart From Each Other Should Hangers be Welded for Leaf Springs on Trailer
    As a general rule, you will want the distance between the hangers on a leaf spring suspension system to be around a 1/2 inch shorter than the length of your leaf springs. This will allow for some movement with the shackle strap. For example, if you have Double-Eye Springs like # SP-210275 that are 27 inches long, you will want to mount the hangers about 26-1/2 inches apart from each other.
    view full answer...
  • Leaf Spring Recommendation to Replace a 27 inch Spring
    Sounds like the Leaf Spring part # SP-210275 would be what you need. This spring has a distance of 27 inches from eye to eye and has a capacity of 1,500 lbs per spring. This would be the closest matched spring to what you would need in terms of capacity and dimensions. I attached an install video for you to check out as well.
    view full answer...
  • 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...
  • Difference Between Measurements on 3,500 lb Double Eye Leaf Spring
    The axle should mount over the center of the 27" 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles # SP-210275. The measurements you see in the accompanying diagram are different because "A" is measured in a straight line from the center of the spring eye to the center of the spring while "B" is the measurement of the curve from the spring eye to the center of the spring, like if you laid a tape measure down on the spring itself, if that makes sense. I have added a link to a video review...
    view full answer...
    Image 1 for
  • How to Select Correct Leaf Springs for 1959 Camper Trailer
    I can help you to determine what you need to know to pick the correct leaf springs for your trailer but you are very much on the right track in terms of the information you'll need. Start with the length from the center of one eye to the center of the other eye, which you said was 30 inches. Even keeping in mind that springs are going to stretch a bit over time, that is a quite a long measurement. The longest we have is the 4-leaf double-eye spring # SP-210275 which measures 27" from...
    view full answer...
  • Minimum Amount of Space Between Tires on a Tandem Axle Trailer
    The bare minimum distance that you can get away with between your tires on a tandem axle trailer is 2". We typically recommend 4" just to have more of a safety margin but since you are at 3" you should be just fine.
    view full answer...
  • How Many Leaf Springs Come With the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles
    The 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles part # SP-210275 are sold individually. It will require a quantity of two per axle.
    view full answer...
  • Replacement Leaf Spring for 1995 Ellis Tandem Axle Trailer
    In order to find if the 4-Leaf Double-Eye Spring # SP-210275 will fit your 1995 Ellis trailer you will need to know your axle capacity and measure your existing leaf springs. This particular leaf spring is for a 3,500 lb axle. The measurement you need is the spring eye to spring eye measurement. Keep in mind, your existing leaf springs will be slightly longer since they flatten over time. If you find that you are close to the 27" length of this spring then it will work as a replacement....
    view full answer...
    Image 1 for
  • Difference Between 3-Leaf and 4-Leaf Leaf Springs
    The only real difference between your current 3-leaf springs and the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long # SP-210275 will be the thickness of the leaf spring stack. This will be 3/8" thicker when compared to what you have now. It may be possible that with the additional material and thickness they will hold up a little better and last longer. Overall though, they have the same capacity regardless of the number of leaves.
    view full answer...
  • 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...
  • Leaf Spring Recommendation to Replace 27 inch Long Spring on Camper with 1,500 lb Trailer Weight
    Length-wise the leaf spring part # SP-210275 that you referenced is about right at 27 inches. Since your trailer only weighs 1,500 lbs though this is going to give you a somewhat rough ride quality. A better option would be # SP-124275 most likely as it has a 2,000 lb axle weight rating and is 26 inches long. I know that's an inch shorter than what you listed, but leaf springs stretch out over time as they wear out so your 27 inch springs were most likely a bit shorter when new like this...
    view full answer...
  • Recommended 27 inch Leaf Spring for my Trailer
    If you are looking for a Leaf Spring that is 27-3/4 inches long, the closest that we offer in length is 27 inches. If your springs are worn, it is possible they were originally 27 inches long and have flattened out over time. We have a Double-Eye 4-Leaf Spring # SP-210275 that is rated for 3,500 lb Trailer Axles. This spring measures 1-3/4 inches wide and the leaf thickness is 3/8 of an inch. We also have the 5-Leaf Slipper Spring with Hook End # SP-160275 which is rated for 6,000 lb Trailer...
    view full answer...
  • Can 4-Leaf Springs be Replaced with 5-Leaf Springs on 2016 Grand Design RV?
    We can certainly help you replace your leaf springs, but your 2016 Grand Design Reflection 29RS, has Lippert 3,500 LB tandem axles, and unfortunately there are no 5-leaf springs available which meet that capacity. To find proper replacements, you will need to know the length of the springs from the center of one eye to the center of the other eye. If that measurement is 25-1/8 inches, you will want the 4-Leaf Double-Eye, # SP-212275. If the eye-to-eye measurement is 27 inches, you need...
    view full answer...
  • Leaf Spring Recommendation for 1966 Aristocrat Lo-Liner
    I believe the part # SP-210275 will be your best option. It is 27 inches in length and is designed for 3,000 lb axles which is a bit more than what you would need, but would still work fine. The only spring we have that is exactly 26 inches is the part # SP-256275 which is for 4,500 lb axles.
    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 that...
    view full answer...
  • Picking Out Replacement Leaf Springs for 1992 Grady White 204C
    Trailer leaf springs do tend to stretch out over time as they wear out so what you described sounds normal. For a 29 inch worn out spring with your weight listed at 2,550 lbs the best solution is most likely the part # SP-210275 which is for a 3,500 lb axle and measures 27 inches in length. The springs come with bushings but no other install hardware is included. If you need other components let me know which ones and the dimensions of the components themselves and I can set you up with...
    view full answer...
  • Replacement 26-1/8 Inch Double-Eye Leaf Springs for 3,000 Pound Boat Trailer
    The closest option we have available to the measurements and specs you provided is with the Universal Group 4-Leaf # SP-051275. This particular unit measures 26 inches long from eye to eye (your existing spring would have stretched a bit over time), 1-3/4 inches wide, and has a bow of 4-1/4 inches. I have attached a diagram as well. Also keep in mind that when you measure your existing leaf springs you want to make sure the trailer is lifted or the springs are removed, as a loaded trailer...
    view full answer...
    Image 1 for
  • Replacement Leaf Springs for Dump Trailer with 3500-lb Axle
    If your 10-foot dump trailer was made with a 3500-lb axle you cannot double its weight capacity just by swapping out the leaf springs to higher-rated ones. Any trailer's rated weight capacity depends on all of the component parts used to fabricate it. These include the trailer frame, the dump bed itself, the axle and suspension and even the specific hubs, wheels and tires on it. Changing one of these components to another with a higher rating does NOT mean that the entire trailer now has...
    view full answer...
  • Picking Between 27 inch and 25-1/8 inch Long Leaf Spring for Trailer
    There wouldn't be a noticeable difference between a 25-1/8 inch leaf spring and a 27 inch spring. But since the 25-1/8 inch size # SP-212275 is more common it would be what I would go with in case you ever had to replace them in the future. This would make your future replacement a little easier.
    view full answer...
  • 30 inch 1,500 lb Leaf Spring Recommendation
    The best recommendation I could make for you would be a 1,500 lb spring like the part # SP-210275 and have the hangers moved so that they accommodate this 27 inch spring by a qualified welder. I attached a review video and an FAQ on trailer suspension for you to check out as well.
    view full answer...
  • How to Pick Out Replacement Leaf Springs for a Trailer with 2 inch Wide Double Eye Springs
    All of the double eye leaf springs we carry are 1-3/4 inches wide. The best recommendation I could make would be to find out what the axle capacity is for your trailer and then go with the springs that are rated the best based on that. You are going to have to install new hangers anyway so you really wouldn't need to match up the lengths of your old springs. Near the coupler of the trailer there should be a plate or sticker with the axle capacity of your trailer listed. Once you have that...
    view full answer...
  • Torque Spec for 9/16" x 3" Long Bolt for Suspension
    There is not a specific torque requirement for bolts like the Shackle Bolt # 166081. You'll want to make sure that you're using a lock nut and ensure that the bolts you use are long enough so that when installed you will have at least 2 threads protruding that lock nut.
    view full answer...

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