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4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 26-1/4" Long

4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 26-1/4" Long

Item # SP-264275
Our Price: $63.61
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Trailer Leaf Spring Suspension
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Shipping Weight: 14 lbs
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Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,300-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter. Great Prices for the best trailer leaf spring suspension from Universal Group. 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 26-1/4" Long part number SP-264275 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-264275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf Springs
  • Slipper Springs - 1-3/4 Inch
  • 26-1/4 Inch Long
  • 4300 lbs
  • Universal Group

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,300-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing 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 bushing included
  • Pre-mounted hangers or aftermarket hanger kit (sold separately) required for installation
    • Eye of spring attaches to hanger mounted on trailer frame
    • Slipper end slides into hanger or equalizer


  • Quantity: 1 leaf spring
  • Spring capacity: 2,150 lbs
  • Axle capacity: 4,300 lbs
  • Length from center of spring eye to end of spring (unloaded): 26-1/4"
  • Spring width: 1-3/4"
  • Eye diameter with bushing: 9/16"
    • Eye diameter without bushing: 1"
  • Leaf thickness: 3/8"
  • Number of leaves: 4
  • Additional dimensions: see table

Open Eye Slipper Spring

Part NumberABCDEF

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.

Slipper leaf springs attach to hangers that are welded onto your trailer. The eye of this spring will attach to the front hanger with a suspension bolt. The slipper end of the spring will slide into the rear hanger. If you have a tandem- or triple-axle trailer, the slipper end will slide into the equalizer that connects multiple springs. The shape of the slipper end of a leaf spring may vary slightly due to differences among trailer manufacturers. Because of this, it's important to check your leaf spring's slipper end before purchasing a replacement spring.

To mount this spring, you will need hangers, a suspension bolt, and possibly a spring keeper bolt, depending on the design of the rear hanger. If you are simply replacing a spring, you may still have hangers welded onto your trailer, but it would be wise to replace the bolts as they can experience wear. It is also 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-264 Universal Group Slipper Trailer Leaf Spring - 4 Leaf - 2,150-lb Capacity

Replaces C-4

Customer Satisfaction Score:

Customer Reviews

4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 26-1/4" Long - SP-264275

Average Customer Rating:  4.9 out of 5 stars   (170 Customer Reviews)

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 4,300-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.


Excellent spring quality for my custom motorcycle trailer. Arrived quickly. Glad I ordered a nylon bushing though. It didn't come with one for the open ended side and it should have.

Well we definitely want to make sure you get all the parts that you paid for. I will have customer service reach out to you soon to make sure that gets taken care of.
-- Etrailer Expert Brooke M - 06/27/2022


Had these on for a year under a 20 foot pontoon. Easy install and exact match. Old springs were shot and dragging tires on the fenders. These have held up great even on some rough gravel roads.

Great price, fast delivery, and trailer is back to new.

Leaf springs are still working great a year in. Excellent product.
Nate W - 10/13/2022


Fortunately, one spring broke a leaf so I naturally replaced both. I could feel the difference and all the noises were gone. Just like plumbing, replace everything involved, bolts, washers, etc. I don't think I will ever have to replace them again.

Still working the same as the day I installed them. Still quiet and smooth.
Robert - 06/14/2022


Alyssa did a outstanding job assisting me with the right parts for my trailer and I might add they arrived 3 days early, I was most impressed with how quick I got the parts and the ease in tracking it. They have my business ion the future. Thank You Alyssa.


Everything fit perfect. I had to replace the leaf springs on my boat trailer. I have a 24' fiberglass boat that is launched and retrieved in the salt water the original springs only lasted 7 years. The new springs are heavier duty and painted or coated with a better material. Over al very very pleased.


The springs went right in without any problems. Very quick shipping.


Everything came and I was amazed at the fast shipping. I just finished installing everything and it all fit like a glove. Will need some more parts for the bunks later and will shop with you again. Enclosed you will find the parts I ordered and before and after photos. Thanks Alot

Springs are very good and does the job. Thanks
Lewis - 03/23/2019


Super easy to install! What they recommended to me was the perfect spring replacement. Just wish I would've bought four new bolts instead of two, lol. I'm loving etrailer so far! Keep up the great work!
Pics are before and after. They obviously don't sell old springs. :)


Exactly what we needed good new product that arrived with speed and efficiency thank you guys


I received my new leaf springs and bushings way earlier than expected! Installation was quick and easy! So glad to have my boat back in the water again! Thank you etrailer for the great customer service!


I will tell you in 5 years if they rust away. But they look good.


I have had these on my trailer for a year. They installed easy and have held up well. Good price and a good product. Thank you.


I like shopping for trailer parts on this site. It’s easy to search, the product quality and pricing never disappoints and the parts arrived very quickly.


victoria very nice to talk too
and smart .


Part works great and your Costumer Service Rep was amazing


These springs fit my trailer perfectly and provide a great ride for my boat.


Fast shipping, easy to find your trailer suspension parts and good quality.


Fast shipping


Parts were delivered on time and the order was correct.


Worked perfectly. Glad I replaced them. Little did I know the main spring on one of the trailer's leaf pack had broken in half. The only thing keeping it together was the pressure from the rusting u bolts. Be prepared, I had to cut the bolt and u bolts off with a cut off wheel the old hardware was so rusted. If you have a doubt about your leaf springs, don't take a chance, replace them.

Mever has someones words rang so true! I had a leaf snap in the Siskious far away from civilization as we know it. 60 mph snap! The fender ped down and all I saw was smoke, and POP! Tire down. Now Im no machanic but I wasnt leavin my boat roadside out there. So I built a suspension with some construction wood in my truck. That wooden spring lasted 250 miles till I was home. Moral of my story, listen to this man. Replace that old fatigued steel!
-- comment by: Tony - 07/28/2013


Great! Happy to have a reliable source for parts while refurbishing my trailer.
Great customer service. Efficient delivery.


4 leaf 4300lb springs install on a 21’ boat trailer. Parts came earlier than expected and where of excellent quality. Couldn’t ask for a better experience. Thanks etrailer!

i sold the trailer but the product is still working for the new owner. thanks,
James - 06/08/2020


Everything was as advertised and fit great no problems at all. I would use and recommend to all my friends and anyone needing trailer parts. The staff is very knowledgeable.

The staff was great in helping me get the right parts and the leaf springs are wonderful.
David - 02/23/2019


Easy install and greatly improved how my car trailer handled. Full disclosure though... Someone had installed one eye-to-eye spring instead of a slipper spring on one of the axles on the left side of the trailer. Caused it to buck to the right of you hit a larger bump in the road. All nice n smooth now....


Bought 4 sets of 4 blade springs, spring u bolts, and a hitch coupler....blinked twice and Received order, lightning fast shipping. Highly competitive prices (the best I found anywhere), and outstanding quality merchandise. I did have a problem with the transporter (the shipping folks) ...they delivered a badly ripped up box and some of nuts and washers from the u bolts were missing. I contacted etrailer and they made it right immediately and took VERY GOOD care of me even though the ripped box was not their fault. Top notch customer service folks, I could not be happier. A+++++++++ Highly recommend etrailer, will buy from them again. Thanks, CWW, Aiken, SC

Show More Reviews

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

  • Replacement Boat Trailer Slipper Spring for a 1998 Calkins Boat Trailer
    Based on what you have described and the measurements you have taken I do believe that slipper spring # SP-264275 is correct. The SP-264275 length is 26-1/4 inches so the mid-point length of your existing spring is on par with that. The old springs have probably stretched and worn enough to throw the exact measurement off a bit.
    view full answer...
  • Replacing Boat Trailer 3-Leaf Slipper Springs to Correct for Reduced Wheel/Fender Clearance
    Axle capacity is usually found on a plate or sticker affixed to the axle itself. 3-leaf slipper springs in the 1-3/4-inch width you referenced can be seen on the included link. Since well-worn springs like yours tend to become elongated I suspect your existing springs when new were this length and that your axle is rated for 1500-lbs. In some instances it may be possible to find higher-rated springs that will fit on your trailer but substituting these will not necessarily increase the...
    view full answer...
  • Availability of C Hook Leaf Spring for Caulkins Boat Trailer
    Since you have a C hook type spring you really need to replace it with another C hook unless you are okay with replacing all of the spring components. We only have one c hook spring as of right now part # SP-264275, but it has a 4,100 lb axle capacity and is 26-1/4 inches in length. If having a slightly lower capacity spring is okay then this should work otherwise.
    view full answer...
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  • Is Slipper Spring SP-264275 the Same as Universal Group UNA-264
    Yes, slipper spring # SP-264275 is the Universal Group part UNA-264 so they are the exact same. This is considered an open slipper spring. I he also included a link to our help article on slipper spring suspension for you.
    view full answer...
  • Will Slipper Spring for 4,300-lb Trailer Axles Work For Axle Rated For 2600-Lb Axle
    I did some research and for a 2-inch square axle the rating can be between 2,200 to 3,500 lbs. It sounds like the tag on your trailer axle falls within that range. The 4-Leaf Slipper Spring, part # SP-264275 you asked about is designed to work with trailer axles up to 4,300-lbs. This can result in a little stiffer ride but the dimensions are most important so if the mounting dimensions are a match for your trailer, # SP-264275 will work great for you.
    view full answer...
  • Which Way Do Slipper Springs Face on a Trailer
    With slipper springs you will want the eyes of the spring facing the front of the trailer and the open end facing the back. I attached a help article on slipper springs for you to check out as well.
    view full answer...
    Image 1 for
  • Horse Trailer Slipper Spring Recommendation that is 1-3/4 inches Wide
    What you described is a slipper spring. We carry a few different slipper springs that are 1-3/4 inches wide. I attached a link to a page that has all of them. You will want to know the axle capacity you would need and the overall length. With that info we can set you up with the right springs. For a 4,000 lb axle for example, you would want the part # SP-264275 which is 26-1/4 inches long.
    view full answer...
  • Recommendation for Leaf Springs on a Boat Trailer
    Good news, I can help you pick out the leaf springs needed to replace your current ones. It sounds like you might need leaf springs like this # SP-264275. They have a slightly lower capacity than you specified, but they match the length and leaves of your current springs. I would verify the axle capacity of your trailer to make sure the 2,050 lbs. weight rating will work for you. I have linked a Help Article for your convenience. If this spring does not meet your needs please send...
    view full answer...
  • What is the Center Height for Redlne 4-Leaf Slipper Spring # SP-264275
    I went to the warehouse and measured the Redline # SP-264275 Slipper Spring and I have the measurements posted in the picture. From the ground to the top of the bolt it is 6-1/4 inches. From the ground to the top of the top leaf it is 6 inches and from the center of the hook area to the center of the eye it is 26-1/4 inches.
    view full answer...
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  • Is Bushing Required on Open Eye End of Slipper Spring
    A bushing is not required for the c-hook end (sometimes called an open eye end) of a slipper spring like the 4-Leaf Slipper Spring w/ Open Eye End # SP-264275. The closed eye of this spring does have a bushing included; I have added a link to a video review of this spring for you to take a look at, as well as a link to a help article on slipper spring suspension for you to take a look at.
    view full answer...
  • Replacement Slipper Leaf Spring Recommendation for 1985 Load Rite Trailer
    For a slipper spring that is 1-3/4 inches wide the highest capacity option we have is the # SP-264275. This is a 4,300 lb axle spring that measures 26-1/4 inches from eye to end of spring. I attached a picture that has all of the dimensions of the spring listed for you to check out and compare to your current spring.
    view full answer...
    Image 1 for
  • Availability of 4,300 lb Axle Slipper Spring for Trailer
    When picking out a leaf spring you really want to base it on the capacity of the axle and the length more so than the amount of leafs in the spring pack. If you can get me the axle capacity of your trailer and how long you need I can get you the best recommendation. If you have a 4,300 lb axle and need a 26 inch long spring though the part # SP-264275 is your best option overall and would work great.
    view full answer...
  • Confirming Correct Leaf Spring Size Measurements
    It sounds like you already have done the correct center of one eye to the center of the other eye measurement. If your measurement is slightly off, sometimes the leaf spring may still work as leaf springs do expand by as much as 3/4-inch over time. Since you measured 26" and the 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles # SP-264275 is already 26-1/4" long, you will want a shorter option though I don't see we have that in an open eye end style of spring.
    view full answer...
  • Looking for a C-Hook Leaf Spring That Measures 26-1/2 Inches Long
    We have the 4-Leaf Spring C-Hook Spring, # SP-264275, that measures 26-1/2 inches from center of the bolt eye to the edge of the C-hook. See attached picture diagram. Unfortunately, we do not have a spring with only 3 leafs in this style leaf spring.
    view full answer...
    Image 1 for
  • How to Measure Leaf Springs to Find Replacement Parts
    The 26-1/4 inch measurement of # SP-264275 is taken center on center from one bolt to the other. On the diagram I've attached it's measurement "C". This is the measurement you'll want to make on your springs. Then find the same length for a replacement. Keep in mind that your springs, being used and worn, may have elongated so your might be a little longer than the new ones.
    view full answer...
    Image 1 for
  • Installation of Slipper Spring with Open Eye End
    Slipper Springs like # SP-264275 do not use a bolt and bushing for the open eye end of the spring. It connects directly to the hanger using a slipper spring hanger kit.
    view full answer...
  • Replacement Slipper Spring Needed That is 1-3/4" Wide and 27-1/2" Long
    We do have a selection of slipper springs that are 1-3/4" wide which I have linked for you to check out. The one that is closest to the size that you mentioned is the 4-Leaf Slipper Spring # SP-264275 which is rated for 4,300 lb trailer axles. It measures 26-1/4" long which may still work out for you since leaf springs can stretch out over time. A leaf spring doesn't necessarily have to have the same amount of leaves as the one it is replacing. You just have to be sure that it has the...
    view full answer...
  • Replacement Slipper Springs for EZ Loader Trailer with 26-1/4 Inch Springs
    The Universal Group 4-Leaf Slipper Spring # SP-264275 referenced in your question is indeed the closest option we have available for a slipper spring that matches the dimensions on your trailer. Slipper springs come in 1-3/4 inch, 2 inch, 2-1/2 inch, and 3 inch widths, so you most likely do have a 1-3/4 inch width spring set, especially since you mentioned that it looks a bit over 1-1/2 inches. The 26-1/4 inch length on this slipper spring matches the length on your set exactly. The only...
    view full answer...
  • Replacement Leaf Spring Needed with One Open End on a Bayliner Trailer
    It sounds like the 4-Leaf Slipper Spring w/ Open Eye End # SP-264275 could be what you are looking for. Over time leaf springs can stretch so this one being 1/4" shorter than your current leaf spring is most likely correct. This leaf spring is rated for a 4,300 lb axle and comes with 4 leafs. The amount of leafs isn't really important since you are simply looking for the weight capacity to be right at or slightly more than what your axle is rated for. The only real issue that I see is...
    view full answer...
  • Replacement 26 Slipper Spring for Sea Lion Trailer
    I believe you need the 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles # SP-264275 which measures 26-1/4" from the center of the spring eye to the end of spring.
    view full answer...
  • Karavan Tandem Boat Trailer Slipper Spring Replacement, is Bushing On Hook End Required
    The 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles - 26-1/4inch Long Item # SP-264275 that you referenced does not require an additional bushing for the hook end to attach to the rear hanger. The hook end of the spring will rest on the spring bolt and the only bushing needed is on the eye side of the leaf spring.
    view full answer...
    Image 1 for
  • Is There Normally Play In Rear Hanger of Slipper Springs
    Slipper springs do have a looser connection on the rear of them based on how they are designed. I am not sure exactly where the extra half inch of movement is that you referenced but if it's a vertical movement that's pretty standard. If you can get me the width of your springs, the length, and the axle capacity I can recommend you the best option we have! I attached a link to a page that has all of the slipper springs we carry as well. You need to select your axle capacity first, and...
    view full answer...
  • How to Determine Correct Replacement Slipper Springs
    I can help you determine how to figure out the right replacement slipper springs, though I'm not 100% certain what you mean by "where can I find how much space or clearance is required." I think you are asking if there is a standard amount a slipper spring will elongate over time, and the answer is unfortunately no, as it all depends on the amount of weight on the spring, the amount of time it was used, the quality of the spring, etc. I would take into account an inch or so of your slipper...
    view full answer...
    Image 1 for
  • Open Eye Mounting Kit For Trailer
    To mount leaf springs to your trailer you will only need the Redline # APS3SE hanger kit for your single axle trailer. If you additionally need U-Bolts to attach your springs to your axle just let me know if your axle is round or square and what diameter it is.
    view full answer...

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