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  1. Trailer Leaf Springs
  2. Universal Group
  3. 27 Inch Long
  4. Double Eye Springs
  5. 3500 lbs
  6. 4 Leaf
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
Our Price: $80.22
Trailer Leaf Springs
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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. Great Prices for the best trailer leaf springs 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 etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (212)
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Universal Group Trailer Leaf Springs - SP-210275

  • 27 Inch Long
  • Double Eye Springs
  • 3500 lbs
  • 4 Leaf
  • 1-3/4 Inch Wide
  • 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.


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: 1,750 lbs
  • Axle capacity: 3,500 lbs
  • Length from center of spring eye to center of spring eye (unloaded): 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
SP-21027513-1/2"14"27"2-3/4"


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 Satisfaction Score:


Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (212 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.

by:

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 etrailer.com 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.



by:

You sent the wrong spring 3 were correct 1 was wrong messed up my delivery date

Etrailer Expert

Katrina D.

3/8/2024

I am sorry that this pushed back your delivery date. I see our customer service department is currently working on getting the return process started.



by:

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



by:

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.



by:

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.



by:

With the outstanding help from Tommy at etrailer.com, 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.



by:

Good shipping quick and quality product



by:

Super fast shipping great part



by:

The spring arrived earlier than I thought it would. Looks like it will fit and do the job. I purchased the leaf spring as an emergency back up in case on breaks on the Trailer. E Trailer hasn't let me down.



by:

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



by:

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.



by:

The product was correct but the ordering was next to imposible. It took weeks longer than necessary. It wasn't until I was refered to Mgmt. that my order was resolved, gratefully. All in all the 2 day project took 3 weeks. Still upset a year later.



by:

Easy installation dose what I need it to do.

Lee

2/25/2023

Product has worked just fine and hasn’t broken after using for a year. It has been loaded most of the time.



by:

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!



by:

Installation pictures.



by:

Great service. I know that I needed to do something to my trailer but I had no idea where or how to get the right parts Everything was too rusty to find any part numbers. I sent them a few pictures and gave them the measurement that they asked for and in about 30 mins I had a complete parts list of what I needed. When I got the parts everything was correct and fit great. Will defiantly be ordering from them again. Preston, and Jessica B were very helpful....

Corey

3/1/2019

I rebuilt my little 5x8 utility trailer with parts from you guys and its been holding strong. Thanks for all the help. I went into this build without knowing much about suspension and you guys were a big help at getting the right parts.



by:

All Parts arrived as ordered and their quality and type is as expected, thank you.

However, I would suggest better packaging when shipping leaf springs. The loose nature of the packaging seems to have caused the leaf springs to puncture the box causing a 2 day delay in shipping and the potential loss of my other items.

Mark

8/25/2019

Great. Theyve been under the boat and holding it up just fine



by:

The springs arrived quickly and they were an exact fit. Installed in about 1 1/2 hrs. Thank you very much



by:

Replaced a older set on a trailer with no specs. Bought the length closest to what I had, but a higher weight capacity. Replaced the axle to a 3500 lb one too. Have more confidence in the trailer now and I know it's a lot safer. How do these compare to others? I don't know. It's very hard to find these things locally and few sites have as good videos as etailer. These guys seem to know their stuff. There was lots of specs on these items at this website so I felt confident planning and executing the trailer upgrade.



by:

Very fast free shipping



by:

Thank you etrailer!

The shipment
arrived sooner than expected, the leaf springs along with a hanger kit arrived in a heavy duty box with very good packaging. As for the leaf springs they're heavy duty thicker gauge compared to the ones currently on my utility trailer. With beefing up my suspension I'll be able to raise my box and carry a heavier load with my current axle.



by:

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!



by:

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.



by:

It was the perfect size and fit right up. I bought it for my 1963 2 horse trailer with random axels and it worked great. Thank you.

David

1/25/2019

Worked and fit great, I’m sure it will continue to work great for years to come. I love the fact that you took the time to follow up.



by:

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.


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Show More Reviews

See what our Experts say about this Universal Group Trailer Leaf Springs

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    The # SP-210275 you were looking at is for a 3500lb axle and is 27" long measured from center of spring eye to center of spring eye. This is the correct spring for your trailer based on the measurements you provided. The next shortest spring would be 2" shorter which would be much too short. For replacement equalizers we have the # TREQR89 which is 8" long and has a center hole of 9/16", or the # TREQR83 which is 9" long and has a 3/4" center hole. For replacement hardware you can use...
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  • 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.
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  • 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 # e54SR 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.
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    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.
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    As a general rule of thumb the minimum safe distance between front and rear tires on the same side of a tandem axle trailer is 4 inches. If you are at that distance currently there would be no reason to increase the distance. Tire failure is usually caused by a few things. It can be from overloading the trailer, improper tire inflation, and/or exceeding the speed rating for the tire. You should verify that the tire capacity you have for you trailer is adequate for how much your trailer...
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  • Torque Specs for U-Bolts with 3,500 Pound 4-Leaf Double-Eye Springs
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