Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 2,900-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.
Features:
Specs:
| Part Number | A | B | C | D | E |
|---|---|---|---|---|---|
| SP-039275 | 13-5/16" | 30" | 15" | 17-3/4" | 4-7/8" |
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.
Average Customer Rating: 4.9 out of 5 stars (141 Customer Reviews)
Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 2,900-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.
Working good still, nice ride for my custom built trailer
Great Experience! When I noticed that the leaf springs on my 44 year old boat trailer had cracked I thought I would never find replacements. I fully expected to have to have something custom built. I was amazed when I found the fantastic diagrams/descriptions dimensions for replacement springs on etrailer.com The phone support person was wonderfully helpful in confirming if items were in stock and ready to ship. The replacement springs arrived on time and everything bolted up perfectly! Thanks for such a great site!
These new leafs raised the suspension 2" as my old ones were really worn out. I was able to change them both within an hour as I had the use of a forklift to hold up the trailer, and impacts to loosen the old bolts. When/if I need them again, I would buy these.
Super service getting all the right parts. I received the parts in just two days it took about one hour to change both springs .everything fit grate back on the road.thanks
The 30" three leaf, slipper style spring was an exact replacement for the broken spring in this old boat trailer. Admittedly, the original design of the trailer suspension is a bit awkward, but the replacement spring fit right where it was supposed to. Would recommend.
These springs were perfect for replacing the old worn out springs. It was a very easy swap to do. The trailer now tows very well.
Dan - 02/04/2021Great products just wish the shipping end would of kept the box in better condition. Appreciate all the customer service I’ve received and will be using the company soon for another trailer!
Purchased these as a direct replacement to a much older set. Huge difference in strength and quality from what I previously had on the trailer. Matching the size using the product chart was very helpful.
The leaf springs were an easy fix even on a very cold wintery Saturday afternoon. The fit was perfect and shipping was quick.
Fit perfectly Upgraded with this set of springs Quick shipping Thanks
Spring was good, fit as expected. I wish the paint finish was a little more durable but we're talking about a trailer leaf spring here, that's just the way they are. I had to flip the center pin for my application which was easy enough. The most disappointing thing is the way these were packed, like everything else I have ever ordered from etrailer they were literally just thrown in a giant box with a single sheet of packing paper. The box was of course destroyed by the heavy springs bouncing around in the box. You can tell that at some point at least one spring fell out of the box and the shipping company had to put it back in.
Thank you so much. Parts were delivered earlier than expected and fit perfect all I can say is awesome
Outstanding product. Easy install, easy to follow directions.
Wth rusted out leaf springs on my trailer but with zero experience replacing them, I contacted etrailer and Shawn was very helpful in selecting the right parts and taking me through the process. She was patient in terms of helping me take the right measurements and suggesting the bolts and pieces I needed to do the job right. Everything came well packaged and complete two days later. An hour after that the springs were in my trailer and now has a boat sitting on it. Thanks!
Springs fit perfect, fast delivery
Really like new springs! Got them sooner than expected and at a great price. I will recommend e-trailer to all of my friends!
The springs were an excellent fit for my older Chrysler boat trailer. The U bolts I ordered were a little too large but that's ok.....They were returnable but I'll keep them for another trailer project in the future. I would recommend dealing with etrailer. Very helpful on the phone and during the order processing. I had the package within a few days.
Charlie Y - 11/02/2014I made a dumb mistake by ordering the wrong slip springs from etrailer. The part numbers for the springs I wanted and the ones I received were very similar, and I must have been distracted by my kids during the ordering process. I called etrailer and they were very professional on the phone and quickly got the correct springs shipped. Their service is good and I will shop with them again. Thanks,
Everything is here and everything looks good thanks etrailer
Great spring. Fit perfectly
Always launch in Salt water, rinse when I get home. Still look amazing, very little rust
Came in on time fits perfectly on my boat trailer
Service was excellent. Ordered leaf springs on Monday and they were delivered two days later. My shipping was upgraded at no additional cost to me. I haven't installed the springs yet but they look great and they should fill my needs. I will order from you for any future needs.
Great experience. After my order was placed, I was notified it would be arriving sooner than expected. It did just that. Good looking leaf springs, even though I haven't installed them yet, they look pretty good. They weren't damaged in any way and they measured exactly what was specified. Highly recommended website for trailer parts
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