To see if this custom-fit item will work for you please tell us what vehicle you'll use it with.
1,400-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.
Features:
Specs:
Towing or hauling a heavy load can cause rear 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 weight of your vehicle. 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.
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 closed-cell urethane material allows for smooth contact between the springs and your vehicle. And the springs act like a shock absorber to dampen road vibration.
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 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 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.
The helper springs are custom designed to fit your vehicle, and they install easily - no drilling required.
Average Customer Rating: 4.7 out of 5 stars (1378 Customer Reviews)
1,400-lb Capacity. Upgrade your vehicle's rear suspension with these maintenance-free helper springs. Sturdy microcellular urethane springs cushion bumps and help support a heavy load to level your ride and minimize sway. No-drill installation.The sumo springs work great making a big difference in our converted Sprinter handling and ride.
The folks at etrailer were very helpful in us understanding and purchasing the correct springs.
Installed these rear SSR-338-54 and front SSF-106-47 on my 2016 Mercedes Sprinter RV conversion (Thor Citation 24SR)
Easy install. Did this myself and only had to jack up each side of the RV about 6 in. Didn't have to get the tires off the ground or removed the tires. The hardest part of the front where getting the bolts back in through the recessed hole in the suspension to bolt them in place. The rear locked right into place. Total install time about an hour. Only a short trip taken so far but sway seems to have been reduced. Will do a long trip soon to test out.
Made the upgrade to the Sumo Yellow on my 17 Sprinter motorhome and very happy with the results. I started with the lower weight Sumo spring and it was very good however this Yellow version makes a noticeable difference in sway and high wind resistance.
Easy to install with leveling Jacks on your vehicle (LTV UNITY RV). Lifted the rear body with the leveling Jacks and used a screw driver to pry off the bump stops. Placed the rear tab of the sumospring in and used a screw driver to force the front tap into place, almost to easy. Took only 15 minutes total if that.
Very easy install. I used my leveling jacks to slightly raise the rear end of my RV. Quickly removed old bumpers, and snapped the Sumo Springs in place. 5 minutes per side. I had dealer quotes of $600.00 and $$1,000.00.
I spent $250.00 and couldn't be happier. The body roll is greatly reduced, and the ride feels more solid. Excellent product.
They work good. Easy 15 min install
2017 Sprinter Part of the best suspension upgrade available, really helped reducing the excessive sway and roll out of our camper
Got these for my 2018 Dynamax Isata I3. Good improvement to ride and handling so far. Quiets those loud and rough seams in the road quite a lot. Easy install, lots of how to videos out there. Worthwhile addition',good response, service and follow up from etrailer as always.
These work exactly as stated on my 2018 sprinter class C. They do not make the ride harsh at all. The yellows combined with an upgraded sway bar helped stop the sway of coming out of a driveway tremendously. Sway from wind and being passed by trucks was also greatly reduced. The addition of upgraded shocks make it so that I can drive one handed the majority of the time now. Recently had the chance to test these in a long run of coastal highway one in northern CA, they made the extremely windy road a pleasure to drive, even with the bad road conditions. Only scored a 4 and not a 5 because they do not solve all of the issues by themselves, but are an integral part of a total solution.
Great service
After reading all kinds of reviews we finally broke down and ordered Sumo Springs for a 2011 Winnebago View on a Sprinter chassis. We’d been plagued with a top heavy vehicle that tended to sway and rock causing white knuckles on some of the smaller roads and the same occurred on freeways when getting passed by semis. The Sumo Springs greatly mitigated all that. Now the RV goes where I aim it in a straight line without the drama. It also rides smoother and provides some lift at the rear of the vehicle which is good because it doesn’t have much clearance. No more white knuckles and a more confident ride. etrailer ,as usual, shipped fast . They’re one of the best internet retailers you’ll find.
Sumo springs were extremely easy to install and took less than 30 minutes.. They wee installed in a Sprinter based Winnebago RV to help with the swaying of the vehicle when maneuvering over curb entrances and driveways etc. They worked well restricting the swaying of the vehicle. They have now been in for a year and the improvement in driving appears normal to me. I was weighing both the Sumo Springs and Sway Bar installation but the improvement with the Sumo springs alone was enough to avoid the beefed up sway bar modification. Very happy with the product.
Transformed the handling of my Mercedes Benz class B rv. I installed both front and rear components. The sway is greatly reduced and dive is almost eliminated entirely. I won't want to drive the rv without the components. I only wish I had put the components in from mile one. Simply put, they transformed the driving experience. Highly recommended.
Swapped out old bump stops for these in under 10 minutes, really do decrease the body roll.
Not only are the products sold by etrailer great quality but the prices and service can't be beat. One of the best places to shop online
Timely delivery and easy installation
After much research, I decided on these Summo Super Springs for my 2016 Mercedes Sprinter Interstate 3500 RV. They are extremely highly rated by many people and many sources. By adding these units, there will be will additional support for our new electric bikes. Although untested, as yet, due to the "no travel" COVID virus, I am sure that the additional support on the RV frame will provide a better, safer and more comfortable ride.
Excellent service, fast shipping and great product.
We took our first trip with the springs installed. We didn't notice them too much when driving, though cornering might have been easier. But we definitely felt that the vehicle was more stable when parked and leveled up. Glad we bought them!
Great product, Really made a difference on my 2020 Thor Motor Coach.
Worked good 1 month then sold the unit
We have noticed a firmer-steady road ride from our 2018 Winnebago Navion by our purchase of the Sumo Springs. We learned of this product by watching other RV owners online video's from their installation and showcasing the results by driving it down the road.
Good communication
Easy, and noticeable.
Noticed the difference right away. improved the sway and the body roll as advertised. I am planning on doing the fronts next
Do you have a question about this Vehicle Suspension?
Info for this part was:
At etrailer.com we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.
Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.
Error submitting comment. Please try again momentarily.