Description
SumoSprings® are a patented suspension product designed to enhance load carrying ability, stabilize sway, and improve overall driver control and ride comfort. They are maintenance free, do not leak air, and do not require airlines or compressors. SumoSprings® are manufactured in a variety of heights, diameters and densities to support multiple front and rear applications. They are manufactured from proprietary closed micro-cellular urethane providing a smooth and progressive spring rate with superior damping properties. Every SumoSpring is handmade with care, making each one unique with its own natural characteristics, such as slight color variations and surface bubbles—proof of the craftsmanship that goes into every piece.

Jeff Macleod –
Great product, had the same set up on my 2014 Toyota Tundra and have been really pleased with the springs.
James Wright –
these work really well I have 2 snowmobiles on a 2up deck and the truck drives great
Dan Bailey (verified owner) –
I recently purchased the SSR-217-40 for my 2020 Chevy Trailboss. They arrived in 3 days (CA to VA) and I was very impressed with the shipping speed and happy to receive them. I put them on last night and everything went on and fit as expected. I did use the optional 1″ spacer, but have yet to load it down. I expect I will leave the spacer to help with a faster preload. I installed them by myself in about 30 minutes in my driveway and jacked up my truck with a floor jack under my drop down trailer hitch. Lifting the rear end as high as I could without taking the tires off the ground gave me plenty of clearance. The kit came with everything needed, down to a small tube of blue locktite.
John Frieden –
Excellent order processing. My order was shipped much sooner than estimated ship time when I placed the order.
Just completed an 800 mile round trip with my new SumoSprings installed on my trailer. The improvement in ride and towing experience is remarkable. This is the best modification to my trailer yet. If I buy another trailer SumoSprings will be the first thing I install.
William Briere –
The blue one added a slight lift without sacrificing the ride
Phil H Gottes –
Great Product Highly recommended!
Michael Chapdelaine –
EASY TO NAVIGATE WEBSITE. I CALLED THE CUSTOMER SERVICE NUMBER AND SPOKE WITH A VERY INFORMATIVE PERSON TO VERIFY I CHOSE THE RIGHT SUMO SPRING FOR MY TRUCK.
Jacob Szymanski –
Great product but you need to make a separate kit for the trailboss which includes the 1” nylon spacer and the 2” nylon spacer with a M10-1.5 bolt in 90mm and 120mm. The standard kit does not fit the trailboss in the way the instruction manual describes, and it would be a very simple fix to produce a kit specifically for the trailboss.
Steven Teddy –
Great product and awesome customer service. They did an awesome job explaining the differences between products and proving great recommendations of what I need and don’t need.