3-Leaf Slipper Spring w/ Flat End for 2,900-lb Trailer Axles - 30" Long
(164 reviews)
Price: $54.71
In Stock
3-Leaf Slipper Spring w/ Flat End for 2,900-lb Trailer Axles - 30" Long
Item # SP-039275
Retail:$64.41
Our Price: $54.71
You Save: 15%
In Stock
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- Reviews (164)
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Universal Group Trailer Leaf Springs - SP-039275
- Slipper Springs
- 30 Inch Long
- 1-3/4 Inch Wide
- 2900 lbs
- 3 Leaf
- Flat End
- Universal Group
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:
- 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
Specs:
- Quantity: 1 leaf spring
- Spring capacity: 1,450 lbs
- Axle capacity: 2,900 lbs
- Length from center of spring eye to end of spring (unloaded): 30"
- Spring width: 1-3/4"
- Eye diameter with bushing: 9/16"
- Eye diameter without bushing: 7/8"
- Leaf thickness: 3/8"
- Number of leaves: 3
- Additional dimensions: see table
| 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.
UNA-039 Universal Group Slipper Trailer Leaf Spring - 3 Leaf - 1,450-lb Capacity
Replaces WIF3
Customer Satisfaction Score:
95% were satisfied with this product
5% of customers were not satisfied
- Wrong item was ordered
- etrailer mistake
- etrailer mistake
Customer Reviews
3-Leaf Slipper Spring w/ Flat End for 2,900-lb Trailer Axles - 30" Long - SP-039275
Average Customer Rating: 4.9 out of 5 stars (164 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.by: Joe V.06/11/2013
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!
by: Foz06/22/2018
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.
by: Jeffrey 10/05/2023
Shipped quick, fit was correct no need to modify anything good price wish they were made here but it’s hard to find correct springs made here
by: Mobile Service02/20/2017
Fit perfectly
Upgraded with this set of springs
Quick shipping
Thanks
by: the_hand03/13/2023
the old springs had broken into many pieces - and the dimensions of this slipper spring seemed correct. It was - perfect fit
by: Larry 09/22/2023
Arrived on time
by: Michael Hollin04/04/2015
Really like new springs! Got them sooner than expected and at a great price. I will recommend e-trailer to all of my friends!
by: Charlie Yarnall11/01/2013
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.
by: Fred12/21/2020
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
by: Steve H.08/25/2017
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.
by: Matthew06/03/2020
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.
by: Cape Jim08/10/2017
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!
by: Anthony R08/04/2017
Was very happy with the product. My boat trailer riides better now with the new leaf springs!!!!! I have recommended your company to friends with trailers.
by: David04/19/2021
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.
by: Bill08/08/2014
I 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,
by: john s.06/11/2014
ordered new trailer tires/wheels, springs, etc... except for the fact they sent me painted not galvanized wheels, but quickly fixed the issue, could n't be happier. priced right, delivered promptly, great quality, etc.. have ordered here before and just as happy.
by: chris oak05/05/2017
The springs and other trailer parts I picked up are working great! I really appreciate all the help you folks provided when I was ordering, this was my first time refurbishing my trailer and it made it easy, I will definitely be ordering from your company again when the time comes.
by: Steven12/23/2014
3-Leaf Slipper Spring for 3,000-lb Trailer Axles
Ordered the leaf springs and the quality was good. The shipping was fast and the price was good.
by: Rich M10/27/2016
Great product, as described, description of the measurements fit right on.
I would & have recommend E-trailer to friends.
Rich M.
10/27/2017
Fit and works as described, Im happy with the product.
by: Jesse06/02/2022
They fit perfect it would have been cool if they included new hardware i mean it just 2 nut and 2 bolts.
by: Bryan06/07/2022
Exactly what I needed for revamping my boat trailer
by: James w04/23/2014
Great service and product on the slipper leaf springs. My trailusage and old 1977 dilly trailer everything fit perfect ,Thanks for the support y'all have at etrailers.
by: Michael07/14/2018
I received the order on the 2900 Lbs slipper springs. The box was a little damaged but the springs did not have paint damage. The 1200 Lb springs were bottoming out is why I went to the new spring. The New spring is an exact fit.
Mike L.
7/14/2018
Im glad to hear that youre happy with the springs you purchased. Keep in mind that if your old springs were bottoming out because they were overloaded, swapping them out for higher rated springs wont necessarily raise the capacity of your trailer. Youll still be limited by whatever component has the lowest rated capacity, be it the spindles, axle, springs or tires.
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Show More Reviews
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Do you have a question about this Trailer Leaf Spring?
Info for this part was:
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Installed by:
Cole B
Updated by:
Wilson B
Updated by:
Manda E
Written by:
Alexander C
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Charlie Y.
11/2/2014
The trailer springs I ordered are working fine. I have no complaints or issues at all. I highly recommend etrailer for anyone in need of any type of trailer parts.