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  1. Trailer Leaf Springs
  2. Universal Group
  3. Slipper Springs
  4. 24-5/8 Inch Long
  5. 1000 lbs
  6. 2 Leaf
2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long
Universal Group

2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long

Part Number: SP-177275
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Trailer Leaf Springs
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Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,000-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 springs from Universal Group. 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long part number SP-177275 can be ordered online at or call 1-800-940-8924 for expert service.
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Universal Group Trailer Leaf Springs - SP-177275

  • Slipper Springs
  • 24-5/8 Inch Long
  • 1000 lbs
  • 2 Leaf
  • 1-3/4 Inch Wide
  • Radius End
  • Universal Group

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,000-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: 500 lbs
  • Axle capacity: 1,000 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: 2
  • 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-177 Universal Group Slipper Trailer Leaf Spring - 2 Leaf - 500-lb Capacity

Replaces WIC2

Customer Satisfaction Score:

Customer Reviews

2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long - SP-177275

Average Customer Rating:  4.9 out of 5 stars   (181 Customer Reviews)

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,000-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.


I just received the springs a day ago and have not installed yet, but they look exactly what I needed and they were here in 2 days.dealing with etrailer and not the last, keep up the good work.The price was good. I found what I needed and also liked the info vidio. you are always very easy to deal with on line and with a great selection of materials.Bob H


The Slipper spring on a Calkins Trailer (23 yrs old) disintegrated and It took a while to find the replacement because Calkins in now defunct. The E trailer parts arrived in a few days . Everything went well except that the U bolt treads were too short so I had to jury-rig the second plate underneath so that the clamps tightened round the Axle and it is working fine. The first photos show Pre and Post the third photo shows that the axle itself is also corroded and though still strong, I reinforced it with Carbon fiber.


Product was exactly as described, clean, new, and worked for our repair.
The packaging was a little deformed (weak box) by the time it got to me, but still intact and no damage to product.
Repurposed pop-up camper trailer used to haul kayaks. 2K springs that were on it were too stiff and too short (popping out of slipper keeper). These 1K, slightly longer springs were perfect!


Perfect for my bbq pits. On my 3rd one and my 3rd pair of springs.


Great Company Easy to order helpful. Installation was quick and easy


Ordered new leaf springs for my trailer. Great website to locate what I needed. Order filled and on its way in less than 24 hrs. Delivery was ahead of schedule and product was just as advertised. Great customer service with an email at each step informing me of progress of my order. Great site and great company.



I’ve put a lot of miles on my trailer since replacing the springs. Not a single problem and the ones I got are better than the factory supplies ones that came with the trailer. Still very happy with my purchase!


They have everything you need for a boat trailer. Product comes in one or two days. Packaging is great. I recommend this Company to anyone that needs parts for their trailer.





These are a perfect fit for my old PWC trailer. They were easy to install and we’re delivered earlier than expected. eTrailer customer service is the best. I’ll never buy trailer parts from any other online retailer.



Have had these on the PWC trailer for about a year now. The springs are still firm and have shown no signs of rusting. The trailer is towing better too. Dollar for dollar this was the best upgrade Ive made to the trailer. Not at all disappointed at all by this purchase!


Great products and price


This was a hard to find spring from a HARBOR FREIGHT Chinese Trailer. IT WAS A LITTLE LONG BUT SHOULD WORK FINE. Was shipped fast and at a better rate than quoted. these guys are good. thanks for the service, Dale



works great they saved my trailer


works fine . I put these springs on a trailer I built to tow my motorcycle behind the car. The bike weighs 750lbs and the springs are rated at 1,000 per . with 14in tires it tows very well . great price and fast delivery... thanks


Hi Cathy,Sorrry I was slow getting back to you,it has bet wild here because I had 10 people working on the house.The spring i got from you was perfect.I want to thank you for the best and great help from you.I will go and get another one for the other side,as soon as I can get time to work on it.once again thanks a ton for all your help,it was the best. Thanks Gene Robbins

Gene R.


Hi,it works just fine,thanks again for all your help, gene


Came fast, already on and trailer is ro lling


I'm building a light duty trailer for hauling a inflatable boat (100lbs) and outboard (100lbs). These light duty springs will be just about perfect for what I need. It was hard to find light duty trailer springs, seems like most online sites they all started at 2000LBs''


Repairing a small boat trailer and needed new springs and tires. I found these here and at good prices. Hopefully I won't have to do any more work on the trailer but if I do I will be looking here for parts.


Excellent product. The U-bolts fit the slipper springs nicely and were easy to install. I ended up not using the mounting plates as the plates welded to the existing axle matched the U-bolts.


OK, my bad ordering the first 2-leaf spring for my trailer and not realizing it wasn't for the set for both sides.

After calling back a second spring was there in 48 hours and that was with ups ground.

Awesome service, great part, the way it should be done.

USAF LtCol Ret


Works on my 14’ Jon boat trailer. Wish I would’ve went with a little stiffer/ stronger springs but these work great too!


Replacement springsMy husband purchased an old rusty boat trailer to work on for a winter project. He began taking it apart and found out a section of each spring was rusted and broken. We didn't know if we could find replacement springs for such an old trailer. I went on line and one of the first results was I immediately found exactly what I was looking for at a very reasonable price. The real surprise was when the order was delivered to our door less than 24 hrs. later! We now have the website bookmarked for future projects!
Wife of busy retiree.


Replaced the leafs on my mini trailer to 1k lbs springs. Rides so much better now, etrailer was a no hassle buy. Good prices, shipping and tracking. Thank you


Excellent spring for any properly rated trailer. I used the spring on my trailer for an inflatable boat. Worked perfectly and fix exactly. Also bought new u-bolts and plates.


Reasonable price, quick delivery, exact replacement for my sagged, rusted together leaf springs on an old trailer I'm putting back on the road. They are made in China. I didn't see that in the description. Perhaps cou try of origin needs to be included.


slipper spring was exact match..only 40 minutes to install sweet!!! time i drop a tree on my trailer (dont intend to but hey) i will defitnitly order thru etrailer they have it are waycool also went on rim with no prob many thanks highly recomend both items and doin business with etrailer


Product arrived exactly as described, was about a week late (due to circumstances that were out of etrailer's control) I checked with etrailer and they responded quickly and kept me updated on the shipment of my order the rest of the way. I appreciate the great customer service and will be shopping with them again!


I have purchased hitches, wiring, and tires from etrailer over the years and have always found their products and service excellent. Their pricing is always very fair. Thanks for the good service.

Show More Reviews

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

  • Replacement Axle And Leaf Springs For A 4' x 6' Single Axle Trailer
    It is possible to replace your 62" long axle with a longer one. Our next size up is going to be a 72" long 2K rated axle like part # e32GR. The axle being 72" across measured from hub-face to hub-face. This axle comes with 5 on 4-1/2" idler hubs, which will allow for a ton of tire/wheel combos. In order to use our axle you would likely need to relocate the spring seats. We sell them individually with part # TRSS175. From the looks of things, you would need a new u-bolt kit # CE23000 as...
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  • Parts Needed For Adding 1,000LB Slipper Springs To a Cart With No Suspension
    You will need 2 of the Front # CE14016G and Rear # CE14017G hanger brackets to attach 2 of the 2-Leaf Slipper Springs # SP-177275 to your cart. You will need 2 of the Zinc Shackle Bolts # TRFA73Z916DLNZ to attach the leaf springs to the front hanger. If you can tell what shape and size axle you have I can help you find the U-Bolt Kit you need. We have some like the 1-1/2" Square # CE23102 or 1-3/4" Round # CE23000 depending on the size of your axle.
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  • Replacing 6-Leaf Springs On A Tandem Axle Trailer With Lower Rated Springs
    A 7,000 lb spring for a 3,000 lb trailer is certainly overkill. I imagine your ride is going to be very stiff with the current setup. For a 26" spring we have the 6-Leaf Double-Eye Spring for 4,500-lb Trailer Axles # e27SR, which will be much more appropriate for the kind of weight you are pulling. If you stick with a 6 leaf spring, it should not effect your ride height or fender clearance. We do also have a 4-Leaf Double-Eye Spring for 4,000-lb Trailer Axles # e22YR, but reducing the mount...
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  • 1000 lb Capacity Slipper Springs For 400 lb Sailboat Trailer To Ease Rigid Ride
    The 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long, # SP-177275 will most likely work well on your trailer and will ease the beating on your 400 lb sailboat. The 3/8 inch difference in length from your current springs shouldn't be an issue based on the curve, so I don't forsee an issue. However, if you find out it does bind and cause issues, you would need to move the mount. Since you will be lowering the capacity of your trailer, make sure your boat...
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  • Square U-Bolt Kit for Mounting Leaf Springs SP-177275 to 1-1/2 Inch Square Axle
    You have done your homework because you are on the money with the correct U-bolt kit to mount the 2-Leaf Slipper Spring w/ Radius End for 1,000 lb Trailer Axles - 24-5/8" Long # SP-177275. The kit you mentioned, the CE Smith U-Bolt Kit for Mounting 1-1/2" Square Trailer Axles # CE23102 will work wonderfully for this application so you're all set. I have added links below to video reviews of both products as well if you'd like to check them out.
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  • Can Double Eye Springs be Replaced with Slipper Springs on a 1969 Shoreline Boat Trailer
    In most cases switching from double eye to slipper spring requires new hangers and mounting hardware. This would require you to cut the old spring hangers off the trailer and mount the new hangers in the correct location for the slipper springs. Due to the extra welding involved, I suggest you stay with your original suspension set-up. To select the correct springs you need the weight capacity of each axle. Then you need to measure the dimension from center of eye to center of eye on...
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  • Recommended Replacement 22" Long Slipper Springs for Boat Trailer
    I do have an option for you but we don't have any slipper springs in the size you need as they are too short. The best option we can offer you is a new hanger kit with new leaf springs, the Single-Axle Trailer Hanger Kit part # APS3SE is a good option to start with and would pair well with the 2-Leaf Slipper Spring part # SP-177275.
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  • How to Pick Out Slipper Spring for a Jon Boat Trailer
    Your trailer has pretty short slipper springs. Since we don't have any slipper springs short enough your best option is going to be to determine what spring capacity you would need and then get the correct spring for that and then move the hangers of your trailer so that it will accommodate the spring. I attached a page that has a chart with all of the slipper springs we carry for you to check out. Having a trailer sitting lower on one side than the other has potential for tire wear as...
    view full answer...
  • Replacement Tire and Leaf Springs for Karavan 8x8 Snowmobile Trailer
    We do have some 18.5 x 8.50-8 tires available with the Kenda K389 # AM40537 or a full wheel and tire with the Kenda 18x8.50-8 Bias Golf Cart Tire with 8" White Wheel part # AM90002. The wheels have a 4 on 4" bolt pattern, so you would want to make sure that your current hubs use that bolt pattern. These both come with a two year warranty and have a load range b rating which is sufficient for up to 815 lbs. While they say for golf carts, we have had people previously use them on small snowmobile...
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  • 1,500 lb Slipper Springs or 1,000 lb Slipper Springs for a Trailer
    The best way to pick out a slipper spring replacement for a trailer is to base it off of the weight capacity for the trailer and then the dimension of the spring getting replaced. Sounds like you are considering going with the # SP-178275 over the # SP-177275 for your trailer. Both of these springs share the same dimensions, but since your old springs seem to be too soft it would seem like the # SP-178275 would be a better choice. You should note that going with a higher rated spring...
    view full answer...
  • Replacement Leaf Springs and U-Bolts For Karavan 1,000LB Single Square Axle Boat Trailer
    The 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles # SP-177275 are going to be the closest to what you have. Depending on the exact location your red string in relation to the end of the radius spring this may account for some of the difference in the measurements. You do appear to have plenty of clearance in your fenders if the springs are not as tall. Be sure to not reuse your current U-bolts as they appear to be for a 2" axle. The CE Smith U-Bolt Kit # CE23102 is specific...
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  • Replacement Slipper Springs for 1982 Cox Boat Trailer
    Selecting new slipper springs for your 1982 Cox boat trailer's suspension means matching them up to your trailer's axle weight rating and also matching their width and length dimensions. The actual number of leaves does not always matter because different grades of steel can mean fewer or more leaves in a spring for it to reach is rated weight capacity. I think you are on target with the 1800-lbs axle rating for the spring # e29SR you referenced since your 1-1/4-inch diameter axle is not...
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  • Availability Of 1000lb Slipper Spring For A 1000lb Motorcycle Trailer
    The shortest 1000lb rated spring we offer is the 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long # SP-177275 which measures 24-5/8" from the center of the spring eye to the end of the spring as shown in the included diagram. This is a 1-3/4" wide slipper spring so I recommend double checking the spring on your trailer is also 1-3/4" wide, and confirm that you are measuring the length as shown in the included diagram with the trailer off the ground as weight...
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  • Is there a Centering Stud on Both Sides of the Redline Slipper Spring # WIC2
    I pulled a 2-Leaf Slipper Spring # SP-177275 from our warehouse and found that it has a mounting stud on both sides of the slipper spring. Check out the video I attached that shows both sides of the spring.
    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.
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  • How to Order The Correct Slipper Springs For A 1970s Harding Boat Trailer
    The springs you have on your boat trailer are called slipper springs. One end of the spring has an eye and the other is an arched, open end. The front eye of the spring is attached to a front hangar on the trailer and the slipper end is inserted into a rear hangar. To get the correct slipper spring for your trailer you will need to know the number of leaves, the width of the spring, the length of the spring, and the weight rating of the axle on your trailer. The 2-Leaf Slipper Spring for...
    view full answer...
  • Slipper Spring Recommendation for Replacing 26 inch Long Spring
    The closest slipper spring to what you are looking for is the part # SP-177275 which is 1-3/4 inches wide, 2 leaves, and an overall length of 30-1/4 inches. This spring is designed for 2,000 lb axles. If the distance between your spring hangers is 27-3/8 inches this would work well for you assuming the axle capacity is correct.
    view full answer...
  • Hanger Spacing Dimensions for Installing Slipper Springs on a Boat Trailer
    When determining the hanger spacing for a slipper spring you want to go with the dimensions that the hanger kit calls for. For example if you were using the slipper spring hanger kit part # APS3SE with the # SP-177275 you would want a distance of 22-11/16" inches between the hangers measured on center. This would put the hanger right at the beginning of the curve on the spring.
    view full answer...
  • Availability of Slipper Spring for Boat Trailer that is 24 inches Long
    What you have is a slipper spring. This is a common style of trailer spring which we have a few options that are near your 24 inch dimension. We have the part # e77SR which is for a 2,000 lb axle, # SP-178275 which is for a 1,500 lb axle, and # SP-177275 which is for a 1,000 lb axle.
    view full answer...
  • Replacement Slipper Spring For Trailer Suspension that is 25 inches Long
    Since you said it was a hook leaf spring it sounds like you have a slipper spring on your trailer that you are looking to replace. Depending on your axle rating we have a few options. For a 1,000 lb axle part # WIC2, for a 2,000 lb axle part # SP-179275 , or for a 1,500 lb axle part # SP-178275. For a 4,000 lb axle part # 803T3.
    view full answer...
  • How to Determine if Slipper Spring SP-177275 Will Fit Trailer
    I can tell you how to determine if the 2-Leaf Slipper Spring for 1,000-lb Trailer Axles # SP-177275 will fit your trailer, though we do not have information regarding fits for individual trailers. The best way to determine if a slipper spring will fit is by measuring the length from the center of the spring eye to the end end of the spring, as you can see in the accompanying diagram. The best way to get an accurate length of a leaf spring is with the trailer up on jacks with the axle...
    view full answer...
    Image 1 for
  • Can a Trailer with Slipper Spring Suspension be Converted to Double-Eye
    Sounds like your trailer has slipper springs and you are wanting to convert it to a double-eye system. This is definitely possible. It would be just a matter of changing springs and hangers. You would need to go with a leaf spring that is rated for the weight of your trailer when it is loaded an ready to go. I attached a page that has all of the double eye springs we offer. At the top is a chart that has all of the springs and their capacities. Select the capacity you need and then on...
    view full answer...
  • 1975 Dilly Boat Trailer Leaf Springs Replacement Solution
    The closest leaf spring we have is the Slipper part # SP-177275 which is 30 inches overall and is rated for an 1,000 lb axle. This spring could work for you but you'd have to move in your hangers a bit closer most likely.
    view full answer...
  • Distance Between Slipper Spring Hangers When Used with Slipper Spring # SP-177275
    The distance from the center of the bolt hole on front hanger to the rear hanger for the slipper spring # SP-177275 would need to be 23-1/8 inches. I attached an FAQ article on slipper spring suspension systems for you to check out as well.
    view full answer...

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