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A heavy front load can make your ride sag and throw off your steering and braking. These SumoSprings Solo Custom Helper Springs add up to 500 lbs of support at 50-percent compression so your front end stays level and steady. They cushion bumps, absorb shocks, and help your factory suspension handle extra weight without bottoming out or feeling harsh.
These microcellular urethane springs compress progressively depending on the load. Light loads engage softly for a smoother ride, while heavy loads can compress up to 80 percent to give the extra support your suspension needs. The result is balanced handling that feels stable whether you’re driving empty or carrying more up front.
Each spring works on its own to handle uneven or off-center loads. When a curve or crosswind tries to push you around, the independent action keeps each side planted to cut down on body roll and sway. You’ll notice steadier steering through corners and less rocking when pulling into uneven driveways or parking lots.
These helper springs install easily without drilling and require no air lines, tubing, or pressure checks. The closed-cell urethane material resists oil, salt, and UV damage, performing reliably from -25 F to 200 F. Once installed, they work quietly in the background with no maintenance—just consistent suspension support every time you hit the road.
Customer Satisfaction Score:
97% were satisfied with this product
3% of customers were not satisfied
Ratings & Reviews
Super fast shipping and delivery. Had them installed this morning and we're enjoying a better ride with less sway in cornering and curb transitioning. Installed on a Sprinter chassis, B+ touring van.
Installed on a Winnebago VIA Motorhome. Improved ride quality and reduced body sway. I would definitely recommend this product for any Mercedes Sprinter chassis. Highly recommend removing the front tires. Was extremely simple installed once tires removed. Also found it was extremely helpful to have a pencil type magnet to retrieve the removed nut from the factory stops.
While traveling we had a fellow Pleasure Way owner tell us about the Sumo Springs. We had them installed in the front and rear. It made a huge difference in driving. The RV does not sway on major highways when going at higher speeds.
Great product and easy to install. As always etrailer gave great service, quickly answered questions I had and got the shipment delivered quickly.
I originally purchased and installed the SSF-106-47 SumoSprings for the front of my 2017 Mercedes camper van. After using the van for a period of time with those springs and consulting with the manufacturer about a few performance issues, I contacted etrailer and requested that they be exchanged for the SSF-106-40 SumoSprings. etrailer willingly replaced the springs and has indicated that they will refund the cost of my original purchase.
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.
Easy to install
Smoothed the ride, but it is still a Class C box truck. Sumo Springs alone will not give provide all I want. So far I have added Helwig sway bars and a steering stabilizer. Next stop high end shocks.
These work awesome. Installation took about an hour because finding the right size socket (10mm) to remove the old bumper stop took 45 minutes. No more bouncing and dipping around corners. They also improved and quieted the ride. Well worth the money! Wish I'd put the on the rear, instead of air bags.
Purchased for a 2008 Winnebago View. Previously installed read Sumo Springs. As usual, Etrailer quickly processed my order, shipped promptly and included very good installation instructions. Installation took about an hour. Adding the from springs eliminated any wobbling or softness in the ride. The buffeting I experienced when a large semi passed me doing over 70 mph is eliminated. A quick fix to an annoying problem. In an aside: the stock "bumpers require a 13 mm or 1/2" deep socket.
It's been a year since I bought the SumoSprings and I am very pleased with how they make the coach ride and handle. I bought the softer springs because I wanted a smoother ride over bumps. I installed them and test drove the coach and found it to stiff a ride so I called SumoSprings to see if they made a 3 ring spring which they don't. I than asked if it was possiable to cut 1 ring out and was told it would only void the warranty but would not effect the integrity of the spring, so I did and the coach now has about 3/4" free play and the ride is enjoyable not harsh like it was. I know you cannot modify the springs but this is the best way I found to have a great ride and great handling all in one package. Thanks for opportunity to to explain how it helped.
Product was easy to install, I did not have to remove wheels. One note, the instructions claim the nut for the OEM bump stop and the Sumo replacement is 10MM, it is actually 13MM. Because to installation stud is buried in the suspension member, have a magnet handy and a deep 13MM socket. I used a piece of masking tape to keep the nut in the socket while engaging onto hidden stud. First impressions are favourable as I installed this in conjunction with rear Sumo Springs. Noticeable improvement in sway and stability. Low cost high value modification to my Mercedes Spring RV.
Great looking product, easy to install. Didn't give five stars because have not test driven yet.
I was a bit skeptical about these springs, but they do seem to help with the sway and rocking in my Sprinter camper van. I added SumoSprings to the back as well. They were a bit more challenging to install (especially in the front), so I had the dealer install them. It took them more time and effort - more than anticipated. Overall though I am happy with this modification.
I have a 3500 Sprinter RV. Had the SumoSprings installed front and back for $135 at an independent RV service center that also handles RV's. They had never installed them before. I gave them the installation instructions and some advice I learned from some online videos. Sprinter is unloaded at present but notice it handles better going around turns and curves in that it doesn't lean as much and feels very stable. Need to take on a trip to see how it handles when loaded. I noticed a sort of squeakiness I am not sure was there before. I need to drive it more to determine it is from the SumoSprings.
So glad I found these! Best upgrade for my Winnebago Era Touring Van. Simple to install. I only needed a floor jack to get it done. Van doesnt ride like a boat in a storm anymore. Highly recommend for Sprinter vans.
Kris
3/17/2024
Would notcould not go back to not having Sumosprings. Best investment for my vans handling.
Hello, i installed the Sumo springs on my 2020 M/B 2500 pleasure Way camper van 19.5 foot, if you do not want to go in for the full suspension upgrades for 5 to 6 thousand dollars the Sumo spring is a
decent up grade to help with sway, we aren’t off roaders campers
but they work nice in unimproved campsite. I have about 4500 miles on my camper since I installed them which took about a hour. It did raise the camper by about 1/4”.
I just used a floor jack and big flat screw driver for the back and deep well socket for the front ones. Sorry I didn’t take a video or picture. But so far I would recommend the sumo springs it is better then stock bump blocks.
And thanks to etrailer for getting me the right setup
for my camper.
Robert
4/5/2025
My Sumo sprigs are still doing there job eliminating sway. On my 2020 MB 2500 pleasure way camper van Ascent TS.??
Easy installation and a definite improvement in handling
I’ve had the Sumo Springs on my 2018 PleasureWay Ascent (2017 Mercedes Sprinter chassis) for a year. Originally I just installed Sumos in the rear, because I was experiencing some bottoming of the stock suspension, which made an improvement, but after about a thousand miles, I installed Sumos in the front, also. That made a further improvement. There is less sway on curves and in crosswind conditions, and there is no bottoming over bigger bumps such as railroad tracks. A benefit I didn’t expect is that I also gained about 5/8” ground clearance.
Overall, I am very pleased. In my view, for suspension enhancements, there is no better bang for the buck than Sumos.
Cary A.
4/6/2021
It’s now been two years since I installed the Sumos on my 2018 PleasureWay Ascent 2017 Sprinter chassis. I remain convinced that Sumos are the best bang for the buck suspension enhancement available. I strongly recommend doing both front and rear at the same time—I initially did only the back to counter some bottoming I was experiencing, especially when I carried my Vespa scooter on the back. But after another thousand miles, I installed front Sumos. Overall, the ride was improved, sway was reduced, and although the camper handled fairly well stock, it handles much better with the Sumos in all respects. Plus I gained about 58” clearance. All that, without compromising the ride comfort in any way makes them a really good purchase.
Came as shown, easy to install, will see how they work next time out
James
6/3/2023
Worked so well I now have them on another Rv and put them on my power wagon
This set tightened up the suspension on my Mercedes motor home. Cornering is much better which helps the overall handling. I also replaced the sway bar.
I had to loosen the stabilizer bar in order to install the springs. The stabilizer bar is very tight to the springs. I will be able to see after some driving how much stabilzer bar rubs on the springs. The install was on a 2022 Sprinter 2500.
I had Sumo helper springs installed on my Winnebago Sprinter RV both front and back. It made an amazing difference! It no longer felt like riding in a Conestoga wagon…swaying side to side and bouncing everything to the floor. The ride is now smooth. Driving was easier. Turns are suddenly level instead of feeling like I might turn over. I could not be happier with these products! And it only took 20 minutes to install all four!
Fast shipping and fit perfect
Excellent ride with the rear air shocks
Installation was a straightforward and easy. The SumoSprings made a huge difference in the handling of the RV. The large sway left to right from wind or passing semi trucks has been effectively eliminated make the RV much more comfortable to drive.
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Ed
9/17/2024
Does exactly what it is advertised to do. Very happy with the product.