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3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long

3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long

Item # SP-178275
Our Price: $38.42
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Trailer Leaf Spring Suspension
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Shipping Weight: 7 lbs
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Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,500-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. 3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long part number SP-178275 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-178275

  • Camper
  • Car Hauler
  • Utility Trailer
  • Leaf Springs
  • Slipper Springs - 1-3/4 Inch
  • 24-5/8 Inch Long
  • 1500 lbs
  • Universal Group

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,500-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: 750 lbs
  • Axle capacity: 1,500 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: 3
  • 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-178 Universal Group Slipper Trailer Leaf Spring - 3 Leaf - 750-lb Capacity

Replaces WIE3

Customer Satisfaction Score:

Customer Reviews

3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long - SP-178275

Average Customer Rating:  4.8 out of 5 stars   (194 Customer Reviews)

Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 1,500-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.


I have an old 1993 NUWAY 13848 utility trailer and on a cross country trip, my leaf spring broke after hitting a pot hole. I was lucky to make it home safely. E-trailer had replacement spring in various load ratings. My original trailer was a 2 leaf spring rated for 500 lbs (1000 for trailer). E-trailer has springs that were 3 leaf rated for 750 lbs (1500 for trailer). The price was great and the delivery was super fast. Springs wear out from a lot of use and it is best to replace them especially after hitting pot holes for 25 years and 20,000 miles with trailer loaded at 60 to 90% capacity. An old spring may look good but has a limited life with years of use. Oh yes, I replaced both sides and the nuts on the U bolts are fully engaged and torqued. Replacement parts all fit perfectly. I am glad "etrailer" carries everything you need at a super great price.


Came quickly, was exactly what I needed to replace a broken spring on a 1500lb carry on trailer.


I was assisted by Nick and Katie of etrailer. Both were knowledgeable and helped me spec exactly what I needed. Slip springs and accessories for a trailer that is no longer made. Great attitudes and genuinely friendly to boot. The two of them are exactly what we all hope to get when we need factory help on the phone. This is my third order from etrailer. nuff said!

Kit was easy to install and has worked out fine. Video was a help.Your customer service and support was excellent.I have four different trailers, and have purchased other items from you for them. All good experiences. This kit revived my old ice boat trailer.
Fred G - 01/14/2016


Great products great prices super fast service I orderd my stuff late in the afternoon an before I went to bed I got a shipped email and I had my parts in just a few days also check out their low price guarantee so far I like etrailer good job guys

Anthony j - 01/26/2016


Replaced rusty springs on a 14' skiff trailer. Fit perfect, DIY for cheap in the driveway, it would've been easier with an impact wrench. Take their advice, etrailer is the best for a reason, get ALL NEW HARDWARE TOO!! I broke several fasteners removing them, if the springs are bad, so is the hardware. I have done three hitches and a set of leaf springs now with these folks. Their install videos and expert advice made it a breeze to save probably a couple thousand in labor at a shop.


Purchased this in pair for my new to me kayak trailer and they are awesome. The ones that came with my trailer were rusted bad and two leafs only. These are three leafs giving it more load capacity and way cheaper then any of my local big box stores and trailer parts store here in Miami FL. If you need a pair for your trailer do not hesitate and contact etrailer their awesome website and outstanding customer service will get you what you need trust me this is my second time purchasing with them and they have earn my two small trailer business. Oh and if you are not sure about what you need just contact them. Mr. Jameson C helped me, he send me all the details and links of what I needed with details that's CUSTOMER SERVICE thank you guys God bless....


While I haven't tried it yet (naturally I require additional parts, not etrailers fault, I broke a couple of bolts.) The springs arrived faster than promised and fit perfectly.


Quick shipping
Outstanding selection
to find the correct part
Will return as I need trailer parts


Perfect fit part and fast delivery!


Great springs made very well.


I have to service was impeccable.
shipped springs to me quicker than anticipated even though I had one spring off trailer. As soon as UPS dropped of package I went at installing them.
I had no problems and fit perfect.


Replaced these on my old boat trailer along with hangers, shackles, fender brackets and fenders. Good product.

No problems
Theodore - 05/27/2021


Perfect fit for my replacement spring on my 2001 Magitilt PWC trailer.


Price competitive. Using eTrailer parts in my products, specially designed trailers for power sports vehicles. Check out [site], a better way to move your toys without it taking over your garage.
Trailers are just coming to market this spring in power sports dealers in the Midwest.


Ordered early Friday morning before business hours. Parts arrived the following Wensday afternoon via UPS.

The only concern I had with the two springs I ordered was the cheap nylon bushing they came with. I would have preferred neoprene but the springs were stamped made in China so......

Springs and hanger kit I ordered went together and look good.


Exactly what I thought it would be. Worked great.


Good fit, installed easily.


Fast shipping (to Alaska even) and quality product. Thx!


Perfect fit made for easy installation .


Exactly what I needed


Teresa took my order over the phone and did a great job helping me get the right leaf springs for my boat trailer. She also upgraded my shipping for free and my parts got delivered faster! Thank you Teresa!


The leaf springs arrived quickly and in good condition. They installed easily on a 17' long boat trailer and I think they will work well on the road. The boat and trailer are in storage for the off season now but I expect that the weight of a 13' Boston Whaler, 25 hp Suzuki four stroke, and boat gear will be a reasonable load for the leaf springs to perform properly. My only concern is corrosion resistance. There was some evidence of surface rust coming through the paint on the springs in some places. I'm hopeful they don't rust out too quickly.


Spring fit and finish great. Correct dimension and install was easy. U-bolt kit also great. Prices were great. Shipping quick and fair. Thanks.

Still working great.
Byron G - 09/24/2017


Came as expected and beefier than the stock trailer springs and helped increase my trailer load capacity. Very efficient simple and economical.

Springs have held up and have had no issues one year later! Would definitely purchase again!
Dana - 10/12/2018


Best conversion I have ever done.

Show More Reviews

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

  • Troubleshooting Trailer Bounce on a Triple Axle Trailer
    There are a couple things that you can do that will help with the sway and bounce on your trailer when you are pulling it with your vehicle. The first thing you can try to do is tow the trailer level. If the tongue on the trailer is high, then the trailer will not have as much stability if it were level. I attached an FAQ article on picking out the correct rise/drop ball mount so that you can tow level. Another thing you can check is the suspension of the trailer. Worn out components...
    view full answer...
  • Are Trailer Leaf Springs Sold Individually or in Pairs
    The trailer suspension leaf springs that we carry, including # SP-178275 are sold individually. When replacing springs though you will always want to replace all of them at the same time. This spring is rated for 750 pounds by itself. For a pair used on a single axle they are rated for 1,500 pounds. I have linked a video of this spring and a link to our help article on slipper spring suspension.
    view full answer...
  • Recommended 1500-Lb Weight Capacity Slipper Spring For Kayak Trailer
    We have a slipper spring that has a 1,500-lb trailer axle that may work great for you. It is part # SP-178275 and has 3-leaves. The spring length is 24-3/8 inches. I have attached a photo of the leaf spring with the dimension noted. This leaf spring is 1-3/4 inches wide and has a 9/16 inch eye diameter. These are sold individually so you will need to add to the quantity in your shopping cart.
    view full answer...
    Image 1 for
  • Slipper Spring Recommendation for Continental Jet Ski Trailer
    You have what's called a slipper spring. Which the closest matching spring we have would be the part # SP-178275 which is for a 1,000 lb trailer axle like what a jet ski trailer would normally have and has a length of 24-5/8 inches from the front bolt back to the very end of it.
    view full answer...
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  • Bolt-on Hanger Spacing for Slipper Spring # SP-178275
    Yes, the B measurement of the slipper spring part # SP-178275 that you referenced is the correct hanger spacing to use. This puts the spring right where it needs to be on the rear hanger.
    view full answer...
  • Replacement Leaf Springs For A 2007 Triton Dual PWC Springs With 2500lb Rating
    The 3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long # SP-178275 may be a fit however you will need to confirm the axle capacity first. Your existing leaf springs are going to be longer due to stretching over time. This leaf spring has a 22-3/4" eye to slipper rest measurement compared to your 23" and overall length is 24-5/8" compared to your 26". If you can let me know your axle capacity, I would be happy to confirm or recommend another option if necessary....
    view full answer...
  • Determining Which Leaf Springs Fit A Continental AWC11e Trailer
    I would be happy to help you find the correct replacement springs for your Continental AWC11e Trailer, but unfortunately we do not have a break down of the specific components your trailer uses. To determine the correct replacement spring you will need to know the length and width of your current spring, and the rating of your axle. To find the length of the spring you will need to measure from the center of the spring eye to the end of the spring. It is important to make sure you measure...
    view full answer...
    Image 1 for
  • Measuring Replacement Slipper Springs For a 2018 Continental Model EC2K12-1200 Canoe/Kayak Trailer
    Before measuring the leaf springs on your 2018 Continental Model EC2K12-1200 Canoe/Kayak Trailer you will want to get the weight off the springs by raising your trailer to where the tires are just touching the ground. For your slipper springs you will want to measure the points in the included picture. These measurements along with the width and weight capacity will help you to identify the correct replacement springs. You will want to ensure that the design of the spring also matches...
    view full answer...
    Image 1 for
  • How to Pick Out Slipper Spring for Trailer with 1,460 lb Axle
    You will want to also measure the distance from eye to center portion of the spring where the rear hanger holds the spring of your old leaf springs and then pick a leaf spring with the same weight capacity of your trailer axles and is slightly shorter (around 1/2 inch) to compensate for the sag and wear of the old leaf spring. I have attached an FAQ articles that reviews trailer suspension components for you below to check out. If the axle capacity you have is 1,460 lbs like you mentioned...
    view full answer...
  • 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...
  • 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...
  • Replacement Slipper Spring Recommendation to Replace 31 inch Long Spring
    For a slipper spring that would work well for your application you would want the part # SP-038275. This is a 2k rated spring that is 30-1/4 inches long. This should be a much softer spring than what you have as it looks like your spring would be a higher capacity than this one.
    view full answer...
    Image 1 for
  • 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...
  • 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
  • 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
  • Should Trailer Slipper Spring End Point Towards The Rear Or Front Of Trailer
    When installing a slipper spring like The 3-Leaf Slipper Spring w/ Radius End for 1,500-pound Trailer Axles - 24-5/8 inch Long # SP-178275, the slipper part should go towards the rear of the trailer.
    view full answer...
    Image 1 for Image 2 for
  • 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...
  • Replacement Leaf Springs for a 1,500 Pound Boat Trailer
    The GVWR is the gross vehicle weight rating which is the most that the trailer can weight when loaded and ready to tow. Since that figure is 1,560 pounds it is likely that the axle on the trailer is a 2,000 pound axle. That would mean you need to look at leaf springs rated for 1,000 pounds each. There are 2 types of trailer leaf springs that we carry: double-eye and slipper. Double-eye springs have an eyelet on each end whereas slipper springs have one just on one end and sort of a hook...
    view full answer...
  • 27" Long Slipper Springs for a Boat Trailer
    We do have 27" slipper springs. They are the 5-Leaf Slipper Spring w/ Hook End item # SP-160275. These springs are 2" wide and have a 3,000 lbs capacity per spring. They have 5-leafs instead of your 3 but will work just fine on your boat trailer if your current springs are 2" wide. The closet springs we have that are only 1-3/4" wide are the 4-Leaf Slipper Spring w/ Open Eye End for 4,300-lb Trailer Axles item # SP-264275. These are 26-1/4" long.
    view full answer...
  • Could the Bushing of the WIE3 Slipper Spring be Replaced with one for a 1/2 Diameter Bolt
    I spoke with my contact at Universal and he informed me that you could use a bushing with a 1/2 inch diameter with the 3-Leaf Slipper Spring # SP-178275. For the smaller bushing you could get a Nylon Bushing # TRBU11506.
    view full answer...
  • Recommended Solution for Light Boat on Trailer with 1000-lbs Leaf Springs to Help Fight Bounce
    I'll start off by saying that the smallest leaf spring capacity we offer is going to be for a 1000-lbs axle (500-lbs each spring) like the # SP-178275, and the lighter weight of the boat probably has something to do with the reason you're getting so much bounce on the trailer. I'll also say that these are slipper springs, so you would need to verify that you've got slipper springs on your trailer to ensure the correct fit. Once you determine the correct style of spring, in order to choose...
    view full answer...
  • Do you have a spring that is 24 center to center and a reverse curve and closed eye?
    We do not have a spring that fits that specifically. In our 3 leaf springs we have two that are closed eye on one end and reverse curve on the other. The # SP-039275 measures 30" center to end of spring and the # SP-178275 measures 22-3/4" center to center. If you are able to go up to the 4 leaf spring we have # SP-231275 which measures 24-5/8" center to center. If you want to go the 4 spring route the added capacity of the 4 leaf would bring you up to 2,500 lbs per spring which will...
    view full answer...

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