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4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long

Item # SP-212275
Our Price: $48.63
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Trailer Leaf Spring Suspension
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Shipping Weight: 11 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 - 25-1/8" Long part number SP-212275 can be ordered online at or call 1-636-306-4830 for expert service.
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Universal Group Trailer Leaf Spring Suspension - SP-212275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf Springs
  • Double Eye Springs
  • 25-1/8 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 (unloaded): 25-1/8"
  • Spring width: 1-3/4"
  • Eye diameter with bushing: 9/16"
    • Eye diameter without bushing: 11/16"
  • Leaf thickness: 5/16"
  • 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-212 Universal Group Double Eye Trailer Leaf Spring - 4 Leaf - 1,750-lb Capacity

Replaces PR4B

Customer Satisfaction Score:

Customer Reviews

4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles - 25-1/8" Long - SP-212275

Average Customer Rating:  4.9 out of 5 stars   (604 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.


Broken spring on our 33 foot Salem trailer halted our vacation. etrailer had the exact spring replacement for our Salem (used the 'select vehicle' guide), and I received them within 2 days of ordering as promised. Did the installation myself and found them to be an exact fit - glad I ordered extra hanger bolts. Our vacation is back on! Thank you for all your help!!


Good item fit was direct replacement for my original leaf springs.


Perfect fit, easy to install, nice upgrade on a 2018 Tracker Bass Boat trailer that originally had just a single taper leaf.


Looks like HD Quality. Easy install and perfect fit. I replaced all four on my tandem and it took about 30 minutes per side to install. Now getting the 25 year old original parts off the trailer frame and axles is a chapter in its self. I ordered the Never Fail bushings and hardware kit, u-bolt kit, along with new equalizers to go with the new springs. Good thing too because every thing was worn badly. The new parts gave me at least 2 more inches of space between the frame and the axles. The true test will be when I load it up with logs and hit the road. I added some pics to give you an idea of what I had before and 1 after.


Positive ExperienceI recommend etrailer. the price was better than I'd seen locally or online, although it happens that the size and type I needed was a particularly good deal. The service and shipping were surprisingly prompt, and when the box arrived, everything was as advertised.
While replacing four leaf springs is about as much fun as shopping for socks, etrailer at least made ordering a positive experience.
I actually found the video helpful as well. I've included a picture of what mine actually looked like. A breaker bar is a very handy tool.

I have a question, Ive. Measured my springs to be 26. 14 to the center of each bolt, however the springs are nearly gone so can I safely say that my springs measurement should be 25 1/4?
-- comment by: DAVID D - 08/23/2013


Price was great, will see how long they last, have yet to find a set from A manufacture that doesn’t use junk steal. These are notorious for breaking more than five years see what happens


One of the original leaf springs snapped on my Big Tex 35SA 3500lb trailer. Arrived in 3 days and was a perfect Fit! Thank you.


I make my living with my 2008 cargo trailer. On the way to a job, my leaf springs broke on one side and as I nursed the trailer back home afterwards, the other side broke. I ordered all the parts needed from etrailer using their measuring guidelines to get the correct leaf springs and hardware. Having never replaced leaf springs before made me nervous but given the fact that etrailer's website is very comprehensive, I found the correct parts that I needed easily. My parts were delivered quickly and I had the old broken springs off and the new ones installed and was back on the road with only a couple days of down time. I'm very happy with etrailer and will recommended them again and again.


Installed easily, as expected, and are so far working fine on my single axle 18x8 dove tail utility trailer. Just hauled about a ton of pavers with no problems. Springs are made in China.


Replaced both leaf springs, hangers, and shocks on a Dexter 3500lb axle. Entire process took just over an hour.


Perfect fit for my trailer. Seem to be well built. Though they are stamped China. But what you gonna do right. If you need them, you need them. Been on the trailer for a couple months now. And seem to be holding up to the abuse.


Enjoyed everything about the experience. The product was what I thought was a really good price. The shipping cost was fair and shipped quickly and even increased but decreasing shipping time for no extra charge. Product was ready and easy to install


Just what I needed, but more importantly the service was fantastic as usual.


Not much to say about this. I broke a spring while traveling through heavy road construction on I-80 in Northern Nevada. I ordered a new spring from etrailer on the Internet. It arrived in two days and I discovered I had ordered the wrong size when I tried to install it. I immediately contacted etrailer and they sent a new spring immediately. It arrived in three days later. It was an exact replacement and bolted right in and I was back on the road. What else can I say? Great product and great service!


It is always a pleasure do business with etrailer


I purchased a set of these leafs for a utility trailer and they worked perfectly.

A year later and holding up just fine. I installed these springs on my ATV trailer that gets a ton of work literally. With the stones and firewood Ive hauled, they have worked just fine.
Kevin - 05/07/2022


I need new springs for a cargo trailer i am converting to a portable observatory for my telescope. and they had the part and it came in the mail in good time. the springs fit perfectly. only regret is I need more trailer parts to complete the project and I could have saved on shipping had I ordered it all at once.
Thank you for helping get the order quicker without extra coast.


First I want to thank you for NOT sending out a review question 2 days after shipping the product !
Everything for my new springs came in a timely manner and were as advertised. I did have to call because the springs I ordered were too stiff. No problem I returned them and got the ones i should have ordered. Trailer rides much better than when it was new.


It was a great investment. I follow a group of trailer owners who have posted their factory springs breaking/snapping. I like that we can grease them before long trips. The springs gave me the peace of mind I needed before heading out on a cross country trip.

Ronald - 09/15/2021


Easy, straight forward order. Springs work great!


These guys made ordering easy! No long drawn out questions. Shipping was fast and right. If I ever need anything of this nature again I will definitely use them again.


I found etrailer online when I searched for leaf springs for my landscape trailer. I am very pleased at the fast delivery and wide range of good quality trailer products and the helpful knowledge etrailer has on it's website. I replaced my leaf springs on my trailer. The new springs I ordered was a perfect fit.


After discovering a flat spring on my travel trailer, 2000 miles away from home. I called etrailer and consulted with Cailee (customer service) to ensure I selected the correct size spring, she was awesome! She was very knowledgable of the product, handled my complete order, ensured it shipped the same day so I could get it installed and not delay my trip.

The spring actually arrived a day early! Install went great, was easy and fitment was perfect!

Thank you to Cailee for all the help!!!! I will shop etrailer again in the future, they've truly earned my business!


Springs arrived when they said it would. Fit perfectly. Have not taken the trailer out yet - tomorrow


I have used other springs from other suppliers but these hold up better with less failure on our ranch.

Show More Reviews

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

  • Troubleshooting Leaf Spring Shackles that Angle the Wrong Direction Without a Load On the Trailer
    It sounds like you have the correct spring, part # SP-212275. As it is the correct length and weight capacity that you need. I would try putting a load on the trailer first to see if the shackle flips the way it is supposed to face. The spring should flatten out quite a bit once there is some weight on it and the shackle should then angle the correct direction.
    view full answer...
  • How Many Leaves Does the Leaf Spring # SP-212275 Have and is it Sold Individually
    The 4-Leaf Double-Eye Spring # SP-212275 that you referenced has 4 leaves and is sold individually. I attached a review video for you to check out as well.
    view full answer...
  • How Thick are the Leaves in 4-Leaf Double-Eye Spring For 3,500 Pound Trailer Axles, # SP-212275
    I went out to the warehouse and pulled a 4-Leaf Double-Eye Spring, # SP-212275, to measure. At the center of the spring where the bolt is, the total width, including the bolt, is 2 inches. The width of just the leaves is 1.30 inches. Each leaf is approximately 0.30 inches thick.
    view full answer...
  • How to Pick Out Replacement Leaf Springs for a Trailer with Rusty Leaf Springs
    The bolt running down the middle of your leaf springs will keep them together, but if they are showing as much rust as you said they are it would be a good time to replace your springs. The clips are designed to help keep the leafs together although they are already connected at the bolt. You will need to measure the length of your springs from one eye to the other, the width of the springs and determine the capacity of springs you need to pick out the correct springs. I attached a page...
    view full answer...
  • Troubleshooting Trailer Axle Equalizer that Touches Trailer Frame
    The first and easiest thing you should check is that the trailer is being towed level. If the trailer is nose high or low that can cause the equalizers to not sit level. You will need to select the correct rise/drop ball mount so that the trailer sits level. I attached an FAQ on how to do this. If there is significantly more weight on one of the trailer axles you will need to adjust the cargo in the boat or the way the boat is loaded on the trailer to get the proper amount of tongue weight...
    view full answer...
  • Can a Horse Trailer with Torsion Axles be Lifted
    Some torsion axles have leaf springs and if yours does then you just need taller hangers welded on in place of the original hangers. Welding should be done by a qualified professional welder. If the axles are the type that do not use leaf springs then you need a high profile bracket where the axle is attached to the trailer frame. You would need to visit a tractor or trailer supply store or Dexter Axle directly to get replacements or have some fabricated. High profile brackets should provide...
    view full answer...
  • Can I Replace my Leaf Spring with a Stronger One
    You most certainly can put a stronger leaf spring on your trailer. Just keep in mind that it could very well make your trailer ride a little more rigid and won't be as smooth depending on what you upgrade to. We do have a variety of leaf springs that I have attached for you to filter through. You will want to choose one that has the desired weight capacity and center eye measurements that match your current leaf springs. For example, the Universal Group 4-Leaf Double-Eye Spring for 3,500-lb...
    view full answer...
  • Correct Leaf Spring Recommendation for Dexter 3,500 lb Axle
    If you have 3,500 lb axles the best choice would be 3,500 lb springs so that you could take advantage of the full axle capacity (assuming the trailer is rated similarly). The # SP-212275 is a great choice for you as it is a 3,500 lb axle leaf spring.
    view full answer...
  • Can Tandem Axle Trailer Limp to Repair Shop On Three Wheels
    One of the great things about tandem axle trailers is that in the event a wheel fails you have three other ones to keep you from being totally stranded. If you have three good wheels on your trailer and don't have far to go you would be fine to limp to a repair shop. Be sure to have as much cargo out of the trailer as possible so that you don't exceed weight capacity of the single tire.
    view full answer...
  • Solution for Trailer Axle with Drop Spindle that Sits Too Low for More Ground Clearance
    Square axles are pretty uncommon for trailers so there aren't as many options for lifts for them. By your pictures you have a drop axle that is designed to allow the trailer to sit lower to the ground. Your best option is to go with an axle that does not have that built into it and your trailer will sit up much higher. You are going to need to measure your current axles in a few places to get the correct one. You will need to measure from hub face to hub face and then from the spring...
    view full answer...
  • Will Upgrading Leaf Springs Increase Trailer Weight Capacity
    If your leaf springs are the lowest rated component on your trailer then if you were to use leaf springs with a higher weight capacity, like part # SP-212275, it would increase your total weight capacity. However, it sounds like you have a 2,000 lb axle weight rating. In that case upgrading your leaf springs to a higher weight capacity would not increase the weight capacity of your trailer. Since you are always limited by the least rated component you will want to find that component and...
    view full answer...
  • Choosing a Replacement Leaf Spring for a 2012 Continental Trailer
    If you are looking to replace the leaf springs on your 2012 Continental Trailer you will need to simply filter through our linked selection of leaf springs for ones that have the same measurements (or close to) your old leaf springs. For example, the 4-Leaf Double-Eye Spring for 3,500-lb Trailer Axles # SP-212275 is 25-1/8" Long from center of spring eye to center of spring eye and measures 1-3/4" Wide. If that is what you currently have then you will want to use this leaf spring as a...
    view full answer...
  • Leaf Springs for Trailer Carrying 20-ft Pontoon Boat
    If your trailer has the correct carrying capacity for your pontoon boat and if the trailer's suspension is in good order you may not gain anything by switching to 6-leaf springs. Trailer leaf springs are made with varying numbers of leaves and they are selected based on their specific weight rating which needs to match the axle. Spring length also matter too, of course. If the springs are rusted/badly worn you may just need new ones of the same rating. The double-eye leaf springs we have...
    view full answer...
  • Difference Between 3 and 4 Leaf Spring Stack for 3,500 Pound Axle
    As long as the weight capacity is inline with your trailer/axle rating and the measurements match your current springs, the number of leaves in a spring pack does not matter. The difference between a 3 and 4 leaf spring pack within the same weight capacity is simply an indication of the amount of leaves it takes for that particular set to reach its listed capacity. The difference between the two packs will not have an effect on wheel well clearance. The more important factor to consider...
    view full answer...
  • Can you Upgrade Leaf Springs for Increased Ground Clearance on a Trailer
    Using a leaf spring with a capacity higher than what the manufacturer of your trailer recommends will cause a very stiff and rough ride. A higher rated leaf spring pack is not what I would recommend to increase ground clearance. In order to retain ride quality and support while also gaining ground clearance, I recommend installing taller leaf spring hangers since you mentioned that your leaf springs are already positioned above the axle. In order to recommend a taller leaf spring hanger...
    view full answer...
  • How to Pick Out Leaf Spring for 1980s Boston Whaler Boat Trailer
    Thank you for all the info you got for your trailer to pick out leaf springs. The easiest way to pick out the correct springs will be to first get the correct axle capacity for the axles you have and then get the correct length that you need. So if you can get me those two pieces of info we'll be able to get you the best setup including the equalizer (balancing arm) that you need as well. One way to get the capacity is to check the tongue of the trailer for the VIN plate that will have...
    view full answer...
  • Replacement Leaf Spring Needed for a Boat Trailer
    To determine what the correct replacement leaf spring is for your boat trailer we first need to find the weight capacity of your trailer axle and the length of it. The length of a leaf spring is measured form the center of one eye to the center of the other eye (see attached photo). For example, the 4-Leaf Double-Eye Spring # SP-212275 is rated for a 3,500 lb axle and has a center eye to center eye measurement of 25-1/8" long. I have attached a review video of this leaf spring as well...
    view full answer...
    Image 1 for
  • What is Typical Trailer Leaf Spring Deflection
    Typical spring deflection for trailer leaf springs like the part # SP-212275 is right at 1-1/2 inches when at capacity.
    view full answer...
  • Replacement Double-Eye Leaf Springs for Tandem 3500-lb Axles
    Trailer springs can indeed become longer after years of use. If your worn springs measure 26-1/4-inches from eye center to eye center then it is possible that they were 26-inches when new. It is also possible that they were 25-1/8-inches long since this length is common for 1-3/4-inch wide double-eye springs on 3500-lb axles. If your existing springs are 3-leaf, then you can use part # SP-212275. I have included links to our main page for double-eye leaf springs and for our article on...
    view full answer...
  • Replacement Leaf Spring For 2008 Cargo Express XL Trailer
    I was unable to find the specs for your 2008 Cargo Express trailer. The best way to make sure you get a comparable replacement leaf spring for your trailer is to take a couple measurements of the spring you have installed on it. The # PR4B leaf spring you referenced is designed for 3,500 lb axles and has a distance of 25-1/4 inches eye-to-eye. I have attached a drawing of the # SP-212275 with the dimensions noted you can check out. I do recommend replacing both sides of the trailer...
    view full answer...
    Image 1 for
  • Are the Trailer Suspension Dimensions Listed for When Trailer is Loaded or Unloaded
    All of the trailer suspension dimensions we have on our site are for when the trailer is unloaded. It sounds like you are referring to a leaf spring dimension since the A and B dimensions would be the most affected by being loaded or not. I attached a help article on trailer suspension for you to check out as well.
    view full answer...
  • Replacement Leaf Springs for 3500-lb Tandem Axle Trailer
    We can help you select replacement leaf springs for your tandem axle boat trailer. You can click on the link provided to select your axle rating (3500-lbs) and see springs rated for that axle capacity. Then just choose the type of spring you need, double-eye or slipper. You can also sort the results based on spring dimensions, number of leaves, etc. For example, if you need a 3500-lb-rated double-eye spring with 3 leaves that is 25-1/8-inches long (eye to eye) then use part # SP-212275....
    view full answer...
  • How To Determine Correct Replacement Double Eye Leaf Springs for Camper Trailer
    The axle capacity and a couple of measurements from your existing leaf springs will help us determine the correct replacement springs for you. It is best to replace all springs at the same time and to make sure they match the capacity of the trailer axle. Your axles' capacities should be listed on a sticker located near the center of the axles. The measurements from your springs that are helpful when searching for replacements are (A) the length from center of one eye to the center of...
    view full answer...
    Image 1 for
  • Selecting Replacement Leaf Springs for Rockwood Tent Trailer
    You definitely want to replace both leaf springs on your trailer's axle to avoid tracking issues. It is almost impossible to tell the actual length of a leaf spring when it is installed and under load. It is far better to remove one and then measure it, keeping in mind that a really old and/or well-worn spring can actually become elongated from years of use. It is possible for a leaf spring like # SP-212275 to become 1/2- to 3/4-inch longer after many years of use. You also want to ensure...
    view full answer...

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