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Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,700-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-040275 | 13-3/4" | 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 (117 Customer Reviews)
Slipper leaf spring acts as part of a trailer's suspension system by providing an attachment point for a 3,700-lb axle. Spring flexes to resist shock and also ensures a smooth ride. Includes bushing with 9/16" inner diameter.
I rebuilt an old boat trailer and made it a water wagon,
the springs are awesome. 300 gal is nothing for the springs.
Thank you
Exactly what I ordered
Only way to go on smaller trailers
The only minor issue was that the springs were sticking through the box. The springs went on quickly, and fit properly. My only wish is that the product be made in America. I would be glad to pay a bit more.
I have a 20+ year old flat bed trailer. One of the leaf springs [finally] broke. This replacement set was a drop in fit! Perfect for my flat bed trailer. Replacing the springs was made easier by having the right parts and etrailer had them. Thanks, etrailer! Great price, right fit and fast shipping. Can't ask for more.
I was searching for a replacement on an out dated boat trailer. The spring had two broken leaves. It was an unusual slipper spring that mounted crosswise. While I did not find one with the exact configuration, I was able to find a similar one with adequate load capacity and had the correct dimensions for proper mounting. It is working fine.
Very good product. My mechanic told me to go get the same thing I had on my trailer, only more leafs. Knowing very little about these, I couldn't find what I thought I needed...then etrailer came up on Google search. I got what I thought would be needed and all the mechanic had to get were ubolts etc to connect to axle.
These leaf springs should be strong enough to help me save fuel when hauling wood and mulch no matter what vehicle I am using.
Thanks for helping me get what I needed.
Emily
I was restoring my boat trailer and ordered these springs along with hangers and etc. All items were excellent and price was the best I found. Etrailer shipped all my items together in one box which makes it cheaper for shipping. They box items up excellent and delivered by UPS
The springs work just fine. They are a little over kill for my boat. It has raised the trailer more than I would like.
That's my fault. They are exactly what I ordered. Also I like that you can grease them.
Very helpful taking my order and great pricing . Also free shipping at $100.00 is a great money saver based on the weight of trailer leaf springs and all the hardware i received shipping would have been a killer . I will be using this place again for sure !!
Great looking quality, fast fast shipping ??, gives my trailer a higher tire clearance from the deck which is what I needed. My only recommendation to etrailer is seeing if their supplier can start making this same spring in a 32" version due to that's what this 30" spring is replacing. I made some modifications to make this spring work. Overall this is a nice spring pack assembly.
Needed new spring sets in a hurry for an older trailer which had broken springs. The etrailer organization provided the right parts at a good price, with quick shipping. Just what was needed.
Quality parts for a great price. I now have a trailer with better suspension than when I bought it. I am confident it will carry the loads I haul in it for years to come.
I ordered a fender, springs,8 and misc parts for my magic tilt boat trailer to get it back in good condition. Everything was exactly what I ordered and worked great. The order was delivered in two days with free shipping The customer service was also very helpful (thanks Taylor ) Only place to go for your trailer needs.
The Springs that I ordered from etrailer were delivered promptly, packaged correctly, and were an exact fit. I will buy from etrailer again.
I bought these leaf springs about a year ago. Not only did they get here fast I have zero concerns about them. Good stuff!
I tried finding these springs on both [sites] with very little luck. I'm glad I googled it and found Etrailer. The seller on [site] wanted more for shipping then my whole order was combined at Etrailer plus I got my order in 3 days. Great price with great service. I will definitely come back.
Product was exactly as described and arrived in a timely manner. Customer service was great too. Web page was easy to navigate and I would recommend etrailer to anyone looking for trailer parts. They have it all.
Product is what I wanted exact meaurment I'm just trying to get my old one off rusted pretty good then we got rain ugh but great product I will take pic of it installed soon as it's on send ya a pic
Great customer service, good shipping and tracking information, and great follow up throughout the process. Etrailer is an easy company to work with that has great prices on good products. Highly recommended!
You Da Man!!! Perfect fit, boat and trailer has never pulled that smooth before.. thank you for the speedy shipping also.
The leaf springs came early morning on the third, I've looked over the springs and they are in excellent shape just waiting for paint to dry to install and try them out.Overall great service and product.
Hard to find size. Researched approximately 2 hours on Google before I triggered your page. Everything arrived as described Super fast shipping by the way. Will definitely use your company again! Thanks
Every thing worked out great , Easy install , Very happy with your products !
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