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4-Leaf Slipper Spring w/ Radius End for 2,000-lb Trailer Axles - 24-5/8" Long

4-Leaf Slipper Spring w/ Radius End for 2,000-lb Trailer Axles - 24-5/8" Long

Item # SP-179275
Our Price: $35.35
Trailer Leaf Spring Suspension
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Shipping Weight: 8 lbs
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Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 2,000-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/ Radius End for 2,000-lb Trailer Axles - 24-5/8" Long part number SP-179275 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-179275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf Springs
  • Slipper Springs - 1-3/4 Inch
  • 24-5/8 Inch Long
  • 2000 lbs
  • Universal Group

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 2,000-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: 1,000 lbs
  • Axle capacity: 2,000 lbs
  • Length from center of spring eye to end of spring (unloaded): 24-5/8"
  • Spring width: 1-3/4"
  • Eye diameter with bushing: 9/16"
    • Eye diameter without bushing: 11/16"
  • Leaf thickness: 1/4"
  • Number of leaves: 4
  • Additional dimensions: see table

Radius End 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 flat 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-179 Universal Group Slipper Trailer Leaf Spring - 4 Leaf - 1,000-lb Capacity

Replaces WIH4

Customer Satisfaction Score:

Customer Reviews

4-Leaf Slipper Spring w/ Radius End for 2,000-lb Trailer Axles - 24-5/8" Long - SP-179275

Average Customer Rating:  4.8 out of 5 stars   (120 Customer Reviews)

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 2,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.


Easy transaction. Quick delivery. Parts in good condition and fit/work well. Installed in less than 1 hour.


I found the springs to be acceptable. I put them on a 17 Spartan boat trailer. Seems like Spartan had components manufactured to their specs so these springs were not an exact fit. I had to place axle under the springs rather than on top due to spring depth. This was not Etrailer's fault, I forgot to discuss the depth with them. Perhaps they could have inquired further as to use and replacement specs. Delivery was 3 days and Josh was pleasant to talk to. I would check Etrailer out if I needed additional parts.


Great price, great spring, picked up 1/2" more clearance over old worn out springs on my boat trailer. very satisfied.


Haven't used the trailer much but these were what I needed and work well.


2,000 lb. GVW utility trailer came stock with set of two-leaf springs. No wonder it sagged when loaded to 1,500 to 2,000 lbs.
So I ordered a set of four-leaf springs. The description of the springs was very thorough so I was very sure they were what would work and install easily. When the new springs arrived it only took ten or fifteen minutes per side to easily make the switch to the new four-leaf springs. By cleaning all surfaces and going to all steel shorter lock nuts I was even able to re-use the old U-bolts and other hardware. Haven't used it yet (still repairing lights) but I'm sure there'll be a noticeable difference for the better! Thanks e-trailer!


I have purchased a number of items from such ans leaf springs, axle and hub assembly, and other items as well, I recently finished the trailer and it is now on a cross country trip. The trailer has just finished a 3,000 mile leg of this trip and I am told it was so smooth that it could not be felt by the towing vehicle.

Every product I have ordered from has been top quality and has worked extremely well. I would come back again for any of my future trailer needs.


The Reline trailer suspension fit perfect on my small sailboat trailer. It was easy to install and installation instructions video was great for a first timer like me to do the job. Great customer service support helped me out when the first suspension was too big for my trailer. I return it and got the right size. I am very satisfied with the product and the price on the suspension.


I love this product for many reasons. Not only does it take the weight it’s meant for, but it also keeps my trailer steady while and not bouncing around. I have put about 2200 miles in them in about a year (personal trailer and moved from state), and they still feel brand new. Great product and VERY easy to install.


Great customer service!


I used etrailer during my restoration of my 1965 Travler Comet runabout boat. The trailer was in poor shape requiring all new suspension and hardware. etrailer had everything I needed. Easy to find and order. Great service and quick shipping.


Great service and great price. Fit perf ectly.


These are super easy to install. They are strong and hold up great on rough terrain. If you have a trailer with just a 2 leaf suspension, I highly recommend replacing them with these 4 leaf set up.


great spring for the $ fit great


Sorry no photos. All items arrived in a short time after ordering. All items were correct.Support was there if needed. This is our second order through etrailer. Would highly recommend their business and associates.

Springs are working fine. Once again the associates at etrailer extremely helpful.
James - 06/09/2021


These springs were a great replacement for my trailer. The original 1000-lb springs carried the load, but they were stiff with lighter loads. These new springs feature additional leafs that allow the trailer to ride more smoothly with lighter loads, yet remain stable with heavier loads. They were economical and very easy to install, too. One photo shows the difference between my original 1000-lb spring and this product.

The springs are still working great! They rust fairly fast. But I suspect its only surface rust. Id certain buy another set, if I needed them.
Stealthgti - 01/10/2021


I needed new springs for my utility trailer because I broke my old ones about 4 years ago. These springs were a little narrower than my old ones but were a good fit nonetheless.


Good products for a super low
price. Accomplished the goal of bringing life back to a dead trailer. The leaf springs ride much better than the stock rubber torsion axle. The new hubs and bearings roll much easier than the worn out ones they replaced.

A little disappointed in the spring bushing. It seemed like cheap plastic and was quite a bit larger than the bolt so it fit loosely. This was the only real negative I have about the purchased, and that's pretty minor.

Tips for etrailer:
Providing a height of the spring would make spring selection easier. In our case we were starting with scratch for mounting springs, no preexisting mounting hardware. Knowing the height of the spring from mount to axle would have been helpful in selecting a spring for the proper ride height. In a snowmobile trailer application an inch or two in height makes a bit difference in approach angle when loading a sled. This was about the only measurement not listed for springs so we guessed, and it came out well for us in the end.


The slipper spring and hanger kit were just what I needed to replace the originals which were too soft and bottomed out under minimal load. Welded on the hanger brackets and the springs installed just as they should. Now the trailer rides nice and high and carries the load with ease; trails nicely too.


I am very impressed with the whole process from the beginning to the end. I was able to find the 4 leaf spring for my trailer and after comparing ALL the dimension to my broke leaf spring, it was an exact match. It was recommended to replace both sides, so I ordered twp leaf springs. I had several choices of shipping and I select the one that best fit my schedule. The leaf springs arrived on the designated date. The replacement install went flawless because the new leaf springs were an exact part swap out. will always be my first place to look for any parts.


All went good on the install with the exception of the center axel bolt was 1" off from what I had on the boat trailer. I did this repair while at home in Alaska. I use the boat in Cook Inlet fishing for Halibut and Salmon.

All went good and boat trailer is working great in Alaska...Thanks
Larry L - 10/24/2018


I was in need of new flipper springs contacted etrailer and they put onto a great spring it handles my quad wood loads with ease one year later the product is going strong

Great team at etrailer just tell them your problem and they will fix it

Thanks Brian m


Hi Kelsey, Thanks to etrailer I was able to rebuild most of my boat trailer. It was easy. Your parts are of very good quality and are holding up well. This is very important to me as I am a recreational fisherman here in north florida on the gulf of mexico, where salt water is a real problem. I will be using your company again. Thanks for all of your help. Larry


Everything from start to finish with etrailer and the leaf springs I purchased went perfectly! The search for the product was seamless, ordering simple, delivery quick, and they fit perfectly!


Customer service with etrailer as usual was 100%. I placed my order in the morning, and within an hour I received shipping info and it arrived only a few days later. Couldn't be happier with etrailer, I have used them several times and the customer service is hard to beat.

The springs seem to be of good quality. I just put them on so I am unable to comment on their longevity. They do sag a little more than the previous springs I had on the trailer but they should work just fine. I sprayed some liquid rubber coating on the springs to try and increase the overall lifespan, hopefully it will slow the rate of corrosion.


i ordered these leaf springs to replace a broken leaf spring on a trailer mounted BBQ smoker that broke in half. etrailer had the correct part for the best price, with very fast shipping. I would also like to add that I have ordered various items from them over the past 4 years. Each and every one was a perfect fit, with easy installation and exceptional customer service.

Show More Reviews

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

  • Difference Between Amount of Leafs in Slipper Spring Packs for Trailer Suspension
    Some people prefer spring packs with greater amounts of leaves as that in the unlikely event one of them break there are several others to back it up. But the thinner the leaves (to create a multi-leaf spring pack) the more likely one would be to break. The other thing to consider is that a thicker spring pack would raise the trailer up a bit if the spring was mount above the axle. For a 2,000 lb axle we only have one slipper spring available as part # SP-179275 which has 4 springs.
    view full answer...
  • Replacement 1-3/4-Inch-Wide Trailer Slipper Leaf Springs
    It sounds like your trailer uses slipper-type leaf springs like # SP-179275. This and other similar 1-3/4-inch-wide springs are shown on the linked page. You will want to confirm the axle's weight rating; this usually appears on a sticker or plate on the axle itself. You need to choose a properly-rated spring so that the suspension it neither too stiff nor under-rated for the weight load. You will then want to choose a slipper spring of the appropriate length. Do note that a well-worn...
    view full answer...
  • Information Needed to Add Electric Brakes to Car Hauler
    Generally speaking, a tandem axle car hauler would be much more stable than a single axle. You'll want a hauler that has a weight rating greater than the heaviest vehicle you're expecting to haul. You can install brakes on most trailers if your existing axles have the brake mounting flange. To specify parts for you, I'd need to know the capacity of the axles, the bolt pattern of the wheels you're wanting to use and the reference numbers from your inner and outer wheel bearings. I'll link...
    view full answer...
  • Is the Leaf Spring part # SP-179275 Sold Individually
    The Leaf Spring part # SP-179275 that you referenced is sold individually. If you needed a pair for your trailer you would need to order a quantity of 2. I attached an install video for this spring for you to check out as well.
    view full answer...
  • Recommendation For Softening The Ride Of Small Trailer Carrying 2 or 3 Kayaks
    I may have a solution that will save you some money and work. I spoke with our tire expert and his suggestion was to lower the tire pressure a little until you are comfortable with the way the trailer handles and rides. We always recommend using the maximum tire pressure and to air the tires up when they are cold. This is to make sure the tires are capable of handling the maximum load they are rated for. In your case, since you said you are limiting the load you plan on carrying, you...
    view full answer...
  • Can Slipper Spring SP-179275 Replace 25 inch Flat Slipper Spring on Utility Trailer
    Yes, the 4-Leaf Slipper Spring w/ Radius End # SP-179275 that you referenced will fit and work well on your trailer that currently has flat slipper ends. The capacity and length matches well so this would be a really solid choice. I attached an install video for these springs for you to check out as well.
    view full answer...
  • Replacement 1-3/4 Wide 25-1/2 Long Slipper Leaf Spring
    The closest thing we have to those dimensions is the 3-Leaf Slipper Spring w/ Radius End for 2,000-lb Trailer Axles # SP-179275. This measures 24-5/8" from the center of the eye to the end of the hook. Over time leaf springs can flatten out so typically a replacement leaf spring will be a little shorter than the current one. A 1" difference is a bit longer than normal, but if your leaf springs are pretty flat then I would venture to say this is what you're looking for. Just make sure the...
    view full answer...
    Image 1 for
  • How to Choose Correct Replacement Leaf Springs for Boat Trailer
    How did you measure the length of your existing leaf springs? As they wear out, leaf springs will flatten out, making them longer than when new. The best way to get an accurate measurement for a replacement spring is to jack up the trailer so that the axles are hanging free, then measure for length. The # SP-179275 slipper spring you looked at is for a 2000 lb axle, and measures 24-5/8 inches in length which is in the neighborhood of where your springs were length-wise when they were...
    view full answer...
  • Slipper Spring Recommendation for Trailer that Weighs 2,000 lb
    The most important factor when replacing leaf springs on a trailer is to match the capacity of the springs with the capacity of the trailer axle. So for a slipper spring with a 2,000 lb axle capacity what you'd want is the part # SP-179275. This is considerably shorter than what you mentioned having so you will need to move the hangers of your setup to accommodate this spring as it measure 25-5/8 inches overall and 22-11/16 inches from the bolt center to where it mounts.
    view full answer...
  • Correct Slipper Spring for my 16 ft. Aluminum Jon Boat Trailer
    Yes as long as the dimensions are the same you will have no issues with using the 4-Leaf Slipper Spring w/ Radius End part # SP-179275. Most bare 16 ft jons come in under 500 lbs. so the capacity will be perfect for you even if you load it down with gear. I have attached the installation video I made on the springs for you to check out.
    view full answer...
  • Recommended 24" Long Slipper Spring for Trailer
    The closest match we have to what you're looking for is the 4-Leaf Slipper Spring part # SP-179275 which is 1-3/4" wide and measures 24-5/8" long from the center of the eye to the end of the spring on the open end. It has a 1,000 lb capacity.
    view full answer...
  • Slipper Spring Recommendation for a Kayak Trailer
    All things being equal there really isnt an advantage to going with one over the other, its just that when you get to the heavier capacities you only see the slipper style. I would recommend either for you, but more importantly you want to pick the spring set that best matches the capacity of what you plan on towing. In that case I would recommend the 2-Leaf Slipper Spring for 1,000-lb Trailer Axles # SP-177275 since it has the closest capacity at 1,000 lbs per axle. Since your trailer...
    view full answer...
  • Recommended Replacement Slipper Spring Leaf Springs
    Thanks for the photo. Your leaf springs have definitely seen better days and it is time to replace a little while ago. Since you said one side is open and one closed, I assume you have slipper springs. The measurement on the springs is from the center of the eye to the end of the spring in the description. For the measurement you gave from bolt center to bolt center, we have two options: 3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long # SP-178275, and 4-Leaf...
    view full answer...
    Image 1 for
  • Slipper Spring Replacement Solution for Boat Trailer with 20 inch Springs
    The only solution you have would be to move the hangers of your suspension to allow longer springs to fit since we do not have 20 inch long slipper springs. This will require a welder. If the trailer calls for a 2,000 lb axle rated spring the part # SP-179275 would work well. Or if you have a 1,000 lb axle the part # SP-177275 would be what you need.
    view full answer...
  • Recommended Slipper Springs for a 2011 Triton LTWC11 2,500 Pound Jet Ski Trailer
    To determine the correct slipper spring for your 2011 Triton jet ski trailer, you will need to know the width of the spring, the length of the spring, and the weight rating of the axle on your trailer. Based on your measurements you provided about your 2011 Triton LTWC11 2,500 pound jet ski trailer, I think your best option would be slipper springs by Redline # SP-039275. This leaf slipper spring is 30-1/4 inches long and 1-3/4 inches wide. It's designed to work on trailers with 3,000...
    view full answer...
  • How to Determine Load Capacity of Trailer Suspension
    We do not recommend that you exceed your trailer's carrying capacity. You will be limited to your axle's rating. The 3-leaf slipper springs, # SP-039275, that we offer measure 24-1/4" long x 1-3/4" wide. These springs are designed for use on trailers with 1,500-lb axles. If your axles are only rated for 1,500 lbs you would be limited to that. I have included a link to our 2000 lbs axles and a FAQ article on trailer suspension systems for you to check out.
    view full answer...
  • Are Radius End And Flat End Slipper Springs For A Trailer Interchangeable?
    The only difference between the Flat and Radius end slipper springs is the shape of the end of the spring with the radius having an arch and the flat being flat as you can see in the included pictures of the Radius End # SP-179275 and Flat End # SP-038275. The springs are interchangeable but you will want to make sure that the length from the center of the spring eye to the end of the spring is the same, and make sure the spring matches the axle rating of the axle on your trailer. I included...
    view full answer...
    Image 1 for Image 2 for
  • Picking Out Replacement Leaf Springs for 2001 Coleman Utah Pop Up
    Looks like you have slipper springs on your 2001 Coleman Utah pop up. We have replacement slipper springs available like the # SP-038275 which is 30 inches long and for 1,800 lb axles or the # SP-179275 which is 24-5/8 inches long and for 2,000 lb axles. These are both 1-3/4 inches wide which is the most common width for lighter duty applications like yours. If you can get me the axle capacity you need, the length of the springs, and the width I can see if we'd have a direct replacement...
    view full answer...
    Image 1 for
  • Higher Capacity 24-5/8 Inch Long Slipper Spring
    We offer a 1000 lb spring (2000 lbs/axle) spring as part # SP-179275 which has the same 24-5/8 inch length as the # SP-177275 spring you've already purchased, so the spring would be a perfect fit without needing to move any of the spring hangers. You might want to hold off on making any final decisions about your leaf springs until you have a better idea of how much the camper will weigh once completed.
    view full answer...
  • Determining Correct Replacement Slipper Spring For Dual Jet Ski Trailer
    I would be happy to help you find the correct replacement slipper leaf springs for your dual jet ski trailer, but you will need to identify the axle rating of your axle and the width of your slipper spring. To find the axle rating you will want to check the axle tag located on the center of the axle, as it will have the axle rating listed. If the axle tag is missing you can use the GVWR of the trailer divided by the number of axles to get a rough idea. For example if your trailer has...
    view full answer...
    Image 1 for
  • Determining Which Slipper Springs Fit 1988 McClain Trailer W/ 2000lb GVWR
    I would be happy to help you find the correct replacement slipper spring for your 1998 McClain Trailer with a 2000lb capacity, but we do not have a spring that is 26-1/2' long with a 2000lb rating or anywhere close. I recommend making sure you are measuring from the center of the spring eye to the end of the spring as shown in the included diagram. You will need to have the axle off the ground as when weight is on the spring it will stretch and give you an inaccurate measurement. The...
    view full answer...
    Image 1 for
  • How To Calculate the Weight Capacity Needed For Trailer Leaf Springs
    To determine the correct springs you will need to know a few variables to ensure that you do not damage your trailer. You have the first variable being the load or as you suggest a 1,000lb raft. Next you need to add the weight of the trailer frame and all brackets and boards on the trailer. You will not add the axle weight as that is un-sprung weight. Say the trailer frame and components are 500lbs. This puts the un-sprung weight at 1,500lbs. Next you will need to ensure that the load does...
    view full answer...
  • Thickness of 4 Leaf Slipper Spring for 2000 lb Axle Part # SP01-160
    The 4-Leaf Slipper Spring for 2,000-lb Trailer Axles is 1.04 inches thick at the thickest point. If you need some replacement U-Bolts, we offer them. The part # is SP01-160.
    view full answer...
  • Leaf Spring Recommendation for Trailer with Slippers Springs that are 24-7/8 inches
    When picking out leaf springs there are two important things needed. You first need to get a spring that is rated for the weight of your trailer and then get one that is the proper length. Since you sent us a drawing that shows your slipper springs being 24-7/8 inches in length what you would need to do is determine what axle capacity you need. For a 2k axle you would need is the part # SP-179275 or for 1k axle part # SP-177275. Or for 1,500 lb axle you would need part # SP-178275.
    view full answer...
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Info for this part was:

Employee Mike L
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Installed by:
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