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Your cart is empty.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.
Beav
2025-08-23 15:00:32
I bought a Class A RV, on a P32 Workhorse chassis, from an owner that had thrown nearly every upgrade possible at it. Super springs in front, Koni FSDs, HD bellcranks, all new ball joints and tie rods. It was still scary to drive over 35 mph. I had him install a rear Panhard rod and Saf-T-Steer dampener up front. They helped but still not enough. The tail-steering was pretty much under control now but the roll stiffness was pathetic. Knowing these chassis are woefully under-sprung, yet not wanting to go to the expense of sorting out how much to increase the rear spring rate I gave these 'springs' a shot. Amazing! They did exactly what was needed. Now I can drive 65 - 70 mph on the interstate, with 15 - 20 mph crosswinds and not have to continuously roll the steering wheel back and forth. Semis passing still nudge me a bit but nowhere near the swerving back and forth it used to be. Minivans no longer push me around!
desi liggins
2025-08-04 19:36:33
I bought these when i wanted to upgrade the non existent suspension system on my motorhome; the sumo springs don’t just look good: they stopped my motor home from rolling side to side when turning or getting hit with high winds from mother nature or semi’s. Installation was easy minus the rust issues. The before and after pics are night and day.
SebastianT
2025-07-22 16:15:04
This is the second RV I've installed SumoSprings.They are amazing - the swaying and wind impact is such dramatic reduced on those large empty boxes.Driving gets a lot easier and the rear end bottoming out is completely gone.For a short wheelbase P32 (158 inch) with the GM 14 Bolt Axle it's not a bolt on install.Needed to get a adapter plate fabricated.It's a 4x4 inch 1/4 thick steel plate. With a M8 thread in the middle. Then two holes for the screws which are holding bounce stop bracket to the frame.This is the same way how the Chevy Express are mounting their Sumo Springs - right underneath the frame and not to the side.Drove around with this for a few thousand miles and it's holding up beautiful. Superspring has similar adapter plates for RAM pickups, but not yet the P32
Nathan Ware
2025-07-20 18:30:27
Raised the back end of the RV I was working on around 2 inches.
Mike Reed
2025-05-29 17:54:08
I was having a lot of sway and a bit of a rough ride before I purchased the Sumo springs. Install was not bad at all the hardest part was removing the old bumper stops. I was quit Impressed with how much difference these sumo spring made the RV handles 100 times better no sway when being passed on the freeway it handles turns 10 times better. We installed these on a 1996 Fleetwood Bounder and yes I would buy them again. Great product
Erica Quevedo
2025-05-18 16:20:44
Package looked new but when I opened box sumo springs had grease and oil on them. Looked like they were previously installed and we're returned. I order product NEW. I have pictures to upload
Vivian B.
2025-01-27 15:15:07
These sumosprings worked great for our 1997 Coachmen Mirada Class A - RV on a Chevy P30 Chassis. They required professional installation in order to get them in line touching the leaf springs. They cannot be installed on the ground level. Major improvement in bouncing and sway in the rear and helps around corners. Great investment, highly recommended!
Butler
2025-01-10 12:39:24
Installed on my 1997 Chevrolet P30 motorhome chassis. Gross weight on my RV is 16,000lbs. I have the Firestone ride rite air bags on the rear and felt like the chassis was unstable when traveling over poor road conditions such as I-95 in South Carolina. I had the original bump stops that basically crumbled and disintegrated when I tried to remove them. Installation was simple with my application. I could immediately tell a difference but I now have almost 1,500 miles logged since the install and the biggest difference is crossing over uneven pavement, these springs absorb a lot of the violent hard shakes and rattles that would transfer to the chassis prior to installing these. I am very satisfied with these and regret not installing them sooner.
Alain Hebert
2024-12-29 12:20:28
Installed these on my 25 feet class A motorhome on a P32 chassis. There is a lot of hype and speculation on what these do for stability on motorhomes and since they can be installed easily, I decided to go ahead. I cannot say I feel much difference on sway or crosswinds but they surely help, if only slightly and they sure quiet down the rear leaf suspension. I must say on smaller bumps and road ondulations the suspension feels more solide with a kind of luxurious, comfortable rubbery feel. I wish the made them for the front also.
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