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7,000-lb Capacity. Maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. They cushion bumps and support a heavy load to level your ride and minimize sway. Springs attach at top and bottom for constant support.
Features:
Specs:
SumoSprings helper springs are great for RVs or motor homes. Heavy rear loads can cause sag as your factory suspension compresses under the weight of the load. This means that the rear axle is trying to support not only the extra load but also the motor home's weight. And because there is less weight on your front axle, your front tires make less contact with the road, which causes problems with traction, steering, and braking. SumoSprings upgrade your vehicle's factory suspension to level your vehicle, improve driving performance, and keep your ride comfortable.
Each spring in this kit is bolted to two mounting brackets. One bracket is attached to the frame of your vehicle, and the other bracket is attached to the axle, typically above your existing factory leaf spring. Because each helper spring is in full contact at the top and bottom of the suspension's travel, the expanding and contracting action of the SumoSprings enhances your ride under all conditions, not just when it's loaded. And the closed-cell urethane springs act like a shock absorber to dampen road vibration.
SumoSprings provide progressive load control - the more you load them, the stiffer they become. With a lighter load, the springs will compress easily for soft engagement and a less bumpy ride. The springs can also compress by as much as 80 percent to support a heavy rear load and to help your factory suspension bear up under the load. This evens out the weight, which levels your vehicle and ensures that your front tires are making better contact with the road. A level ride means that you have improved driving control, ensures safe headlight aim, and helps to minimize sway. The springs also support your factory suspension, which helps prevent sagging and reduces bottoming out.
The springs work independently from one another to support each side of your vehicle. This action helps to reduce body roll when you make a sharp turn. This also helps compensate for an off-center load.
These springs extend in height by as much as 50 percent to allow more movement in your suspension when you're traveling unloaded, making your ride smoother and more comfortable.
These microcellular urethane springs are tough. They resist abrasion, oil, salt, and UV rays that can more quickly wear out other springs, and they perform well in temperatures ranging from -25 F to 200 F (-33 C to 93 C).
SumoSprings expand and compress vertically with minimum expansion to the sides, so they won't be damaged by nearby mechanical parts and they fit safely into tighter spots. And unlike air springs, SumoSprings require no maintenance or adjustment.
This kit comes with custom-fit brackets that are designed to easily bolt onto your vehicle.
Average Customer Rating: 4.8 out of 5 stars (315 Customer Reviews)
7,000-lb Capacity. Maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. They cushion bumps and support a heavy load to level your ride and minimize sway. Springs attach at top and bottom for constant support.
Our motorhome had some serious stability issues and these springs took care of the problem. eTrailer is great about diagnosing problems, making recommendations and fixing the problem. We won't go anywhere else.
The SumoSprings have reduced the sway when turning. Also, I am not being pushed sideways when a truck passes or during wind gusts as much as prior to installation. But, I think if I do the front springs I would see even more improvement. So, I have seen improvement but I believe more improvements are possible.
I had an rv dealership install the SumoSprings at a cost of $250. The installation is relatively easy. I wish I had done it myself. But, I’m 76 and not as agile as I used to be.
Sumo springs are an excellent product. I installed them myself and found them easy to install. The difference in stability was night and day. They took most of the sway away and it handles much better on the freeway. We’ve had them on for a year now and they still perform perfectly. I would recommend them to anyone with a gas powered class A. Etrailer was very helpful because it’s important to get the correct Sumo Springs for the weight rating of your coach.
Good product simple instructions easy installation. I’m 71 I installed them in about 3.5 hrs. Tip you need good drill bits, it will make the job easier. Hardest part for me was getting tires off and back on. 2018 Bounder 35P. Would maybe give five stars but haven’t taken the road test yet.
Installed SumoSprings front and back on our 17 36T. They really helped side to side and front to back sway.
The sumo springs were fairly easy to install and improved the ride quality and stability of our Allegro SA32.I would recommend them to anyone with a gas coach.etrailer and their employees were wonderful to work with.Thank You!
Great combined with front and rear sway bars 2014 class A gasser rode like a dream
Huge improvement and love the new ride. We went from being pushed around going down the road to a significant amount of stability. Nice!
Greatly improved the ride and handling. Worth every penny.
Could not have gotten here any quicker if you would have driven it here yourself.
Great product.
Front and rear Sumo Springs installed. Have not had a chance to hit the highway as yet. Locally a very good ride. Thanks to Joanne K. for all of her help.
My motorhome drives great and does not sway bad anymore. I also added Michelin tires which made the ride even better!
I had these sumosprings installed on my class A motorhome 1yr ago to eliminate role. I have been extremely pleased to experience a 90% reduction in role and a MUCH smoother ride. The motorhome is easier to drive and maneuver single handed, even in the turns.
Greatly improved ride and handling. Had to re-plumb gray tank drain around spring.
As always, eTrailer service and delivery was flawless for me on these SumoSprings for my 2021 WBGO Adventurer 29B Class A. Installation was done by a local WBGO dealer, who noted that it was easy and relatively quick to accomplish. My reason for getting the SumoSprings was to reduce rear body sway in turns and due to wind buffeting. For this, they seem to work well -- there is noticeably less sway now than before -- which is more confidence-inspiring and takes some of the effort out of dealing with passing trucks or brisk gusts of wind (especially from the side). However, as with any suspension modification that effectively stiffens the suspension, the sway reduction is accompanied by a somewhat harsher ride. This is especially noted when crossing bumps, train tracks, and expansion joints. For me, it's an acceptable compromise, after all, the RV is still a truck and will always ride and handle like one.
I watched the install video probably three or four times before these arrived at the house. I went ahead and removed my wheels just like the install video. Everything went smoothly. I took our Fleetwood Flair 32s on a test drive and I was really impressed with the overall feel of our RV now.. The first thing I noticed was the fact that I’m not having to constantly correct to stay in my lane. In the past my hands were constantly moving to maintain a line. Not now.
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