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  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 3,500-lb Trailer Axles - 27" Long

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

Item # SP-210275
Retail:$71.10
Our Price: $64.69
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Trailer Leaf Spring Suspension
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Shipping Weight: 13 lbs
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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 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 etrailer.com or call 1-833-496-1390 for expert service.
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Universal Group Trailer Leaf Spring Suspension - SP-210275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf 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.


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   (195 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:

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:

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:

I ordered the wrong leaf spring by mistake. Etrailer exchanged them for me. I had to pay shipping. Guess I should have ordered more carefully.




by:

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.




by:

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


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


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:

Easy to install!!! Working well in the trailer!!!




by:

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




by:

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




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 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:

replaced the parts and installed on trailer fit was great




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:

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




by:

Received earlier than expected, parts fit wonderfully. Quick and simple install.




by:

Good quality product, fast delivery.




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:

Easy installation dose what I need it to do.




by:

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




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....


Comments
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.
Corey - 03/01/2019


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:

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.




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.


Comments
Great. Theyve been under the boat and holding it up just fine
Mark - 08/25/2019


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.



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Show More Reviews

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

  • Double Eye Leaf Springs for Boat Trailer, Stretched Out
    Before you can pick out a set of leaf springs for your boat you need to find out the weight rating of your trailer axle. Then you will need to purchase leaf springs that are each 1/2 of the axle rating. The # SP-210275 is rated for 1500 pounds so if your boat trailer axle is a 3000 pound axle then I would say that # SP-210275 is the correct leaf spring for your axle. Due to wear and different manufacturing tolerances the spring dimensions will be slightly different especially for length...
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  • Spring Height Measurement of Trailer Leaf Spring SP-210275
    The measurement is from the exposed face of the first leaf (the longest leaf that the eyes are mounted on) to the center of eyes.
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  • 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...
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  • What is Minimum Distance Between Tandem Axle Tires
    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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  • Can the Trailer Leaf Springs PR427 Install Above and Below Trailer Axle
    The leaf springs part # SP-210275 that you referenced can be mounted above or below the axle. The distance from the center of the spring eyes to the bottom of the spring measures 2-3/4 inches and this spring has the standard 1-1/2 inches of deflection.
    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.
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  • 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.
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  • How to Find the Length of a Leaf Spring on a 1985 Rustler 2 Horse Trailer
    It is best to measure trailer leaf springs without a load on them. It would be best to remove the spring from the trailer completely, otherwise you could jack the trailer up. That will give you the most accurate center eye to center eye length measurements. The next factor that you will want to consider is that springs flatten out over time. If these are the original springs and they measure 27 inches from eye to eye, the original length could have been around 25 to 26 inches. If you...
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  • 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 that is slightly shorter (around 1 inch) to compensate for the sag and wear of the old leaf spring. Leaf...
    view full answer...
  • Leaf Spring Replacement Recommendation for a Boat Trailer with a 3000 lb Axle
    The 4-Leaf Double-Eye Spring # SP-210275 that you referenced that is 27 inches long should work well for you. Typically you want the spring a little bit shorter than the hanger distance (about 1/2 inch) but you're close enough that it should work just fine. I attached an FAQ article on trailer suspension for you to check out also.
    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.
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  • 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...
  • 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....
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  • 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.
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  • 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...
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    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...
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  • Correct Replacement 27" Long Leaf Spring
    The correct replacement leaf spring you are looking for is the 4-Leaf Double-Eye Spring part # SP-210275 which measures 27" long.
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  • Can Leaf Spring Hangers Be Repositioned if Correct Length Replacement Springs Can't Be Found
    For starters, you'll want to make sure you measured the springs the right way. Because trailer leaf springs flatten out over time, be sure to measure the eye-to-eye (or eye to end of spring for slipper springs) while the trailer is jacked up with the axle hanging free. That's the best way to get an accurate measurement. If you still can't find the correct length spring after confirming the measurement, you can indeed replace and reposition the spring hangers if necessary. To retain your...
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  • How To Choose Correct Replacement Leaf Springs for a Trailer
    In order to choose the correct replacement leaf springs for a trailer you'll need a few bits of info such as spring type (double eye, slipper), length, and axle capacity. The 4-Leaf Double-Eye Spring part # SP-210275 for example is a double eye spring, measures 27" long, and is rated for 3,500 lb axles. I have attached a full list of options below. In regards to the braking assemblies and hubs/drums, the axle capacity and bolt pattern would be the two most important.
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  • 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.
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  • Recommended Leaf Spring Replacement For A 1999 MFI Boat Trailer
    To replace your current 26-3/4" double-eye leaf springs I recommend the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 27" Long # SP-210275. It is slightly longer at 27" but are flexible enough to still work for your application with no problems.
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  • Is There a 28" Long Trailer Leaf Spring
    The two closest leaf spring options we have for you are 29-1/2" and 27"long. That said, leaf springs need to be measured unloaded and the exact point will vary by spring type. I would also like to note that leaf springs stretch over time. The 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles part # SP-210275 for example measures 27" long. If you can give me the type of spring you need along with capacity, I would be glad to see if I can offer a more exact recommendation but I have also...
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  • 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....
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