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Rough or uneven roads can make a trailer bounce and rattle. This 4-Leaf Slipper Spring takes that harshness out of the ride by flexing to absorb shock and vibration. Each of its four steel leaves work together to resist jarring impacts, keeping the trailer level and steady whether loaded or empty. With a 1,850-lb spring capacity (3,700-lb axle capacity), it’s built to handle demanding use while reducing wear on the frame and suspension.
When you’re replacing worn or sagging suspension parts, factory specs matter. This spring measures 30" from the center of the spring eye to the end of the flat slipper tip, giving a precise fit that restores proper axle alignment. At 1-3/4" wide with 3/8"-thick leaves, it’s tough enough for consistent performance under load. The sturdy steel construction ensures lasting strength that stands up to long miles and heavy duty use.
Creaking and metal-on-metal noise can ruin a trip. The pre-installed nylon bushing in the 9/16" spring eye prevents that by letting the spring pivot smoothly on its hanger bolt. It keeps movement consistent and quiet, cutting down on friction and extending hardware life.
This spring is made for trailers that use slipper-style hangers. The front eye mounts to the hanger on the frame, and the flat rear end slides easily into the back hanger or equalizer. The geometry is dialed in for simple positioning and a balanced suspension setup. Replace both springs at once for even ride height and alignment, and the suspension will track straight and smooth again.
| Part Number | A | B | C | D | E |
|---|---|---|---|---|---|
| e89SR | 13-3/4" | 30" | 15" | 17-3/4" | 4-7/8" |
Customer Satisfaction Score:
98% were satisfied with this product
2% of customers were not satisfied
Ratings & Reviews
Perfect fit easy to install!
Got my order early both times and got what I ordered, nothing bad to say about etrailer
Sara was fantastic to work with she had my order on its way the same day put spring on my trailer today thank you sara
Everything was great! The trailer springs fit perfectly. The delivery also went good. I am very satisfied
Just what I needed. Replaced old springs and the fit was easy
Fit perfect thank you
This was the only place I was able to find the dimensions and weight rating I needed. Got them installed pretty easily, they're exactly what I needed.
I was told that I was buying springs made in AMERICA but like every thing else they were made in CHINA. If that is what you are sell be proud & put that on your website so the CUSTOMER will know. The Package did show up on time & tracking system is excellent.
Exactly what I expected.
Great product
Packaged very well for the overnight service I needed!!
Great product and support with fast shipping. Thank you!
Exactly what we ordered. Very good quality. We would buy from them again.
Great for my application. The hardest part of the installation was removing the old Leaf springs which had a turn down on the end. I had to seperate the individual leafs to accomplish this. Once that was done, installing these was a breeze. They also provide plenty of support due to the thickness of each leaf.
as described and on time
Great quality materials! Easy to install, very happy with the install. Thank you so much for selling such good springs.Great price also.You have a very happy customer.I will recommend this company.
great deal just what I needed.
T HANKS
Brooke M.
5/2/2025
Looks great! Here for you if you need anything else :)
Unbelievable! Ordered and shipped to my house in 3 days
Bought these in conjunction with new springs and 48" axle for an old galvanized boat trailer (for a Hobie cat). Axle, springs and U-bolts all bolted together perfectly. Trailer is like new!
William
7/11/2025
Have towed the trailer over 300 miles since rebuild. Tows straight and smooth. Could not be happier!!!
Exact match without the rust! Great service and shipping.
Bolted right in and raised my trailer 2” in order to clear the new Kenda tires I added.
Matt, thank you for teaching what a slipper leaf spring was and how to get the correct measurements so I could replace the smaller springs with springs that could carry a greater load with the bigger tires. They are already on the trailer and look fantastic with the bigger tires - THANK YOU
Good quality. Definitely helped with fender well clearance going from 3 to 4 leafs to accommodate a heavier outboard motor. Will need to do some fabricating for the u bolt mounting plates as the bolt that holds the spring together is about an inch off from the original set of springs. Need the axle to be at center of fender well.
Gwendolyn Y.
4/2/2026
Oh yeah, you definitely have better clearance now. What length were your old u-bolts?
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Roland
10/22/2024
These are still working great on my 1985 Long trailer and I have had no problems to date.