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3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long
(642 reviews)
Price: $36.63
In Stock
Universal Group
3-Leaf Slipper Spring w/ Radius End for 1,500-lb Trailer Axles - 24-5/8" Long
Part Number: SP-178275
In Stock
$36.63
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Universal Group Trailer Leaf Springs - SP-178275
Highlights
- Supports 1,500-lb Axles: Rated for 750 lbs per spring to handle light-duty loads safely.
- 24-5/8" Long, 1-3/4" Wide: Sized right for stable tracking and proper hanger spacing.
- 3-Leaf Radius-End Design: Flexes to absorb shock and smooth out rough road bounce.
- 9/16" Eye with Nylon Bushing: Fits standard suspension bolts for a snug, quiet mount.
- Durable Steel Build: Resists fatigue and maintains ride height under repeated use.
- Replace in Pairs: Keeps axle alignment and even ride for consistent suspension action.
Features to know about
Smooth Ride on Rough Roads: 3-Leaf Slipper Spring Flexes to Absorb Shock
Bumpy roads don’t have to mean a rough trip. This 3-leaf slipper spring flexes under load to absorb road shock and keep the ride steady. Each spring has a 750 lb capacity, giving a combined 1,500 lb rating for a single-axle setup. Its 24-5/8" length and 1-3/4" width match the geometry of light-duty axles so the suspension stays predictable over uneven ground. By letting the axle move independently of the frame, it helps reduce wear and tear while keeping things level and smooth.
Durable Steel Build for Reliable Support: Withstands Daily Use
A strong suspension starts with strong steel. This leaf spring is built from sturdy steel to handle repeated flexing without losing shape. At 1/4" thick per leaf, it resists fatigue and keeps its curve longer than tired factory springs. The radius-end design slides easily into the rear hanger or equalizer, giving a secure mount that holds alignment mile after mile.
Hassle-Free Fit: Sized and Bushed for Standard Hardware
Getting the right fit matters for consistent performance. The front eye comes ready with a nylon bushing sized for a 9/16" bolt, or you can swap in a 1/2" ID bushing if needed. With an eye diameter of 11/16" without the bushing, it pairs cleanly with standard hanger kits and bolts like part #166079. The correct “B” spacing of 22-3/4" puts the slipper end right where it should rest on the rear hanger, making installation simple and alignment accurate.
Keeps Trailers Level and Stable: Designed for Balanced Suspension Geometry
When both sides work in sync, your trailer tracks straight and stays level. Each 3-leaf spring supports equal load on its side, helping the axle sit square and the frame stay balanced. Replacing worn or sagging springs with a matched pair restores correct ride height and geometry so your trailer tows steady with less bounce or sway.
Specs
Quantity and Capacity
- Quantity: 1 leaf spring
- Spring capacity: 750 lbs
- Axle capacity: 1,500 lbs
Dimensions
- 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
| Part Number | A | B | C | D | E | F |
|---|---|---|---|---|---|---|
| SP-178275 | 11" | 22-3/4" | 24-5/8" | 12" | 14-1/2" | 4" |
- A: 11"
- B: 22-3/4"
- C: 24-5/8"
- D: 12"
- E: 14-1/2"
- F: 4"
Note
- Important installation note: To ensure proper axle alignment and suspension performance, leaf springs should always be replaced in pairs.
UNA-178 Universal Group Slipper Trailer Leaf Spring - 3 Leaf - 750-lb Capacity
Replaces WIE3
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
- Wrong item was ordered
Ratings & Reviews
4.8
642 reviews
by:
Fred G.
01/14/2015
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!
by:
Anthony j
01/26/2015
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.
1/26/2016
Great
by:
Scott L.
12/08/2017
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.
by:
Manuel
02/16/2018
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....
by:
George
12/01/2018
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.
by:
David
10/05/2019
I have to service was impeccable.
They 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.
They 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.
by:
Tom K
08/18/2019
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.
by:
Cari
04/11/2018
Perfect fit for my replacement spring on my 2001 Magitilt PWC trailer.
by:
Eric B.
03/23/2017
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.
Trailers are just coming to market this spring in power sports dealers in the Midwest.
by:
Russ
07/27/2017
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.
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.
by:
Theodore
05/26/2020
Replaced these on my old boat trailer along with hangers, shackles, fender brackets and fenders. Good product.
Theodore
5/27/2021
No problems
by:
Dana
10/12/2017
Came as expected and beefier than the stock trailer springs and helped increase my trailer load capacity. Very efficient simple and economical.
Dana
10/12/2018
Springs have held up and have had no issues one year later! Would definitely purchase again!
by:
Byron G.
09/24/2016
Spring fit and finish great. Correct dimension and install was easy. U-bolt kit also great. Prices were great. Shipping quick and fair. Thanks.
Byron G.
9/24/2017
Still working great.
by:
BobL
11/06/2018
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.
by:
Vincent
05/08/2019
Ordered and received two leaf springs for a small trailer. The delivery was fast and the fit was perfect. Great store.
Vincent S.
5/9/2020
The springs were a perfect fit and good quality. Very easy process to purchase and install
by:
Robert
04/29/2018
My jetski trailers springs rusted away after ten years of salt water use, so I needed replacement springs. Etrailer provided me with a $17 solution, which I installed in about 15 minutes (for both sides). They have been on my trailer for a year, and still look great.
by:
Daniel
02/06/2018
These springs were on sale and a great price. They replaced old springs on my jet ski trailer. These matched perfectly and installed fine. Good quality, and have been on trailer about a year now and are still in great condition. I did repaint them for a little more protection, but that is up to you as they are pre-painted. Just make sure you get your measurements and weight requirements right when you order to be sure yours fit correctly.
by:
DJV
12/27/2020
I actually wasn’t able to find an exact replacement for my pwc trailer anywhere. But the customer support guy I spoke with at etrailer took the time to describe their axle and I was able to slightly modify it to fit my frame. Good product good price. I’d buy from them again.
by:
Jason
01/25/2018
These were exactly what I needed and were cheaper than from other sites. Additionally, the customer service from etrailer is top-notch. I have purchased many items from them and I am a lifetime customer because of the customer service and the quality/assortment of the products they offer. They are a great group of people to buy from. The delivered leaf springs were exactly as advertised and fit perfect.
by:
Rusty Springer
05/07/2024
New springs work like a charm and look much better than the older ones!
by:
Carmel
02/15/2021
Leaf springs are fine except for their ride a bit too high for pontoon boats if you have a lowering kit I would like to know thank you
by:
Christopher
02/02/2013
The springs were just as described in the item description, very satisfied with the whole experience. Shipped super fast and Great customer service, nice springs perfect fit :-)
by:
Dan G.
02/02/2017
These springs will work perfectly for the aluminum trailer I am building for my inflatable boat. They are good quality and the shipping was very fast.
Thanks etrailer
Thanks etrailer
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At etrailer we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Fred G.
1/14/2016
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.