$249.99Ships within 1 week

Trailer SumoSprings are a maintenance-free suspension enhancement built to create a better journey by reducing G-force in your towable by 68%.  Handmade from micro-cellular polyurethane, they are designed to remove sway, hop, & body roll while increasing overall driver control and comfort while towing.

 The TSS-107-40 is designed for trailer frames with a GAWR of 3,000-5,000 lbs with the spring sitting on top of the axle tube. The blue SumoSprings shouldn’t be compressed past 70% of their original height in order to keep full memory rebound.

This product is designed to work on most trailers with the springs mounted above the axle.  The factory spring plate must not be wider than 4-1/4″.  Because of the varying build designs from different trailer manufacturers, there are occasionally some models that this product will not fit. For installation of Trailer SumoSprings the gap between the top of spring plate and bottom of the frame must be between 5.3″ and 6.55″.

Chris Sedlak
2023-03-14 09:32:50

Super easy to install. I can already feel the difference.

2023-03-09 06:15:12

I wanted to update what I said above about my 2021 JayFeather with offset leaf springs and frame. Super springs reached out and provided me with a solution with the adaptor plate. It’s been working very well for almost 2 years now. Great customer service!!

David Alari
2023-03-08 09:25:21

They Springs really stabilized the front of the vehicle. They were super easy to install and the installation instructions were right on the money.

Larry Murphy
2023-03-08 09:14:53

So far so good, I have not towed the trailer yet.

John Arvin
2022-12-28 08:44:15

Easy to install, made an immediate difference.

David Tindell
2022-11-08 15:39:00

Great product and easy to install.

John Miller
2022-11-04 12:00:25

Very easy to install and looks like a very well-made part...

Alan Hulsebus
2022-10-11 15:17:50

I installed both sides in 1 hour. My tow vehicle feels less bumps from the trailer bouncing. The trailer is much more stable in corners and quick lane changes.

Charles Youngblood
2022-06-17 14:05:18

Install was easy and works Great.

Clay Jones
2022-06-02 08:56:48

Truck rear sumo springs is set for contact under load. Much improvement with towing. Sumo spring on travel trailer with continuous contact seems to have a smoother ride. I’m pleased.

Customer Reviews

12 ratings for the TSS-107-40

4.75 out of 5  

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Product Specifications

Weight 13 lbs
Dimensions 13.5 × 8.25 × 4.25 in
Spring Diameter


Spring Height