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

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

Item # SP-177275
Our Price: $26.04
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Trailer Leaf Springs
Shipping Weight: 5 lbs
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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
  • 1-3/4 Inch Wide
  • 1000 lbs
  • 2 Leaf
  • 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   (178 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.


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!


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.


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


Came fast, already on and trailer is ro lling


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!


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


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


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!


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.





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


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


Great products and price


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


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''


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


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.


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


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!


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.


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


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.


Product delivered as promised. Trailer parts (springs, etc.) well made; perfect fit. Happy camper.


I really like these cheap 1.75" slipper springs. Unlike the even cheaper springs my jet ski trailer came with, these have a clamp to make sure they don't rotate or come apart in the front. These are a bargain for the price, but I would probably rate them in the 800 lbs range.

Show More Reviews

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

  • 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...
    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...
  • Finding VIN on Trailer to Register and Purchase Tag
    A Vehicle Identification Number (VIN) can be found in many different locations on a trailer. It is most common to be found near the coupler on a plaque or embossed into the frame. It however can be anywhere on the trailer frame as there are not consistent rules for this. If you cannot find the VIN anywhere on your trailer frame, you can call your local highway patrol and they can issue one to you so you can register your trailer.
    view full answer...
  • Recommended Leaf Spring Capacity for a Conversion Boat Trailer
    Yes and no, a leaf spring with a lower capacity will provide a better quality ride than a leaf spring with a higher capacity but you will not want to make that part the lowest rated suspension component. Typically, we recommend choosing a leaf spring with a capacity that either meets or exceeds the capacity of the axle. I would be skeptical if the leaf spring pack you have now is only rated at 1,000 lbs. However, since you have converted a boat trailer to a light duty kayak carrier I...
    view full answer...
  • Replacement Hook Style Leaf Spring for Trailer
    Thanks for the photo. The hook end you referenced is a slipper style leaf spring but without knowing the capacity of your axle or the width of the spring is it difficult to give you a replacement recommendation. I've attached the link for the page to all your leaf spring options to assist. The number of leaves doesn't matter but the length, width, and capacity does.
    view full answer...
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  • Replacing Leaf Springs On Trailer To A Lower Capacity To Avoid Road Shock
    Yes you can replace the leaf springs that came standard on the trailer to soften the ride of the trailer. Just be advised that the total capacity of the trailer will be lowered because you will be limited by the lower rated springs. You can refer to the linked articles for help in selecting appropriate springs for your trailer. Do note that very well-worn springs can become elongated from years of use. If you remove a spring from the trailer and measure it you may find that it has become...
    view full answer...
  • Can Trailer Leaf Spring SP-177275 be Used in Place of 1,500 lb Axle Leaf Spring
    Yes, the 2-Leaf Slipper Spring part # SP-177275 will work great in place of a similar setup designed for a 1,500 lb axle. This is for a 1,000 lb axle so it will be a bit softer. It's also the same size as what you have so it will easily bolt up in place.
    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...
  • Can You Remove a Leaf On the 2-Leaf 1K Slipper Spring with Radius End
    The 2-Leaf Slipper Spring w/ Radius End part # SP-177275 cannot be disassembled. It has a 500 lb capacity which will be the lowest we can offer. It should still work fine for a 400 ish lb trailer.
    view full answer...
  • Replacement Trailer Slipper Spring for a WaveRunner Trailer
    Trailer springs tend to stretch out around 1/2 inch from the dimension they had when new. For your waverunner trailer the part # SP-177275 should work well as it has a 1k axle rating and is 23-1/8 inches long where yours is 24. We don't have galvanized springs unfortunately, and I would recommend you keep the spring over/under the axle in the same configuration as you have it now.
    view full answer...
  • Replacement Slipper Spring To Upgrade Stock Malone Microsport Trailer Leaf Springs
    From what I can find online, it looks like the 2-Leaf Slipper Spring w/ Radius End for 1,000-lb Trailer Axles - 24-5/8" Long, # SP-177275 is the best upgrade option for your malone Microsport trailer. This spring is 24-5/8 inches from the center of the eye to the end of the spring. It is 1-3/4 inches wide and has an axle capacity of 1000 lbs. I've attached a video review for you. The only other option for a similar size is the 3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer...
    view full answer...
  • Can Lower Rated Leaf Springs Be Installed on a Trailer to Improve Ride Quality
    You can use a 1,000 lb capacity leaf spring on a 3,500 lb axle without any problems. You should note that your overall capacity would be limited to the lowest rated component of the trailer. Which in your case could be the 1,000 lb leaf springs. So basically you should be able to improve the ride quality of your trailer by going to a 1,000 lb rated spring like the # SP-177275 but you would sacrifice weight capacity. Since your trailer weighs 1,200 lbs you basically wouldn't be able to...
    view full answer...
  • 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...
  • 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
  • Trailer Leaf Slipper Spring With Smallest Capacity
    I am not 100% sure what you are asking for or the parameters you have in mind other than the weight so the best I can offer is the lightest available leaf spring, which has a 500 lb capacity. - 2-Leaf Slipper Spring # SP-177275 This is a 1-3/4" wide slipper spring that measures 24-5/8" long; if you let me know the size you need I may be able to offer a recommendation. Additionally, I have added a link to a video review for you to check out as well as a couple links to help articles on...
    view full answer...
  • Can I Remove a Leaf From the Bottom of a 4-Leaf Slipper Spring
    Eh, yeah, don't do that. The weight capacity of the leaf spring will definitely be affected but it will be reduced to an unknown capacity so if you were to remove a leaf from say part # SP-231275 that has a 5,000 lb capacity then you would essentially be playing with fire when it comes to that leaf spring working properly. You need to keep the leaf springs completely intact and make sure they match whatever other leaf springs are on your trailer, plus whatever you do to one side of an...
    view full answer...
  • 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...
    view full answer...
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  • 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...
  • Do Slipper Springs Come With Suspension Bolts
    Slipper springs like the # SP-177275 and # SP-179275 include the nylon bushings but do not come with a spring-eye bolt. Both of these use a 9/16" diameter bolt so you can use the # 166079 for a bolt and locknut.
    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...
  • 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...
    Image 1 for
  • Slipper Spring Recommendation for Cox Boat Trailer with Springs that are 24-1/2 inches Long
    We have a few options that will fit, but we need to pick out the spring that matches the capacity needed for the trailer. The following springs are the correct fit dimensionally. For a 2,000 lb axle you would need part # SP-179275 For 1,500 lb axle part # SP-178275 For 1,000 lb axle part # SP-177275
    view full answer...
  • 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.
    view full answer...
  • Bunk Bracket Solution for Boat Trailer
    A slotted bunk bracket like the part # DL21742 would work really great in place of what you have now. You could line up the bolt holes on our crossmember with the slots of these brackets and you'd be good.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
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Employee Jameson C
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Jameson C
Employee Adam R
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Employee Jeff D
Installed by:
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Employee Wilson B
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Employee Manda E
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