SumoSprings Maxim Custom Helper Springs - Rear Axle

by: Dennis 01/25/2023

Needed to overcome an interference issue installed with no other problems. Greatly improved drivability great product.1507348

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by: Darryl03/03/2022

Love them. They really make a difference while driving1268158

by: Philip 08/30/2022

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.1384591

by: Joseph05/20/2022

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.1300191

by: Joe 04/10/2024

My motorhome drives great and does not sway bad anymore. I also added Michelin tires which made the ride even better!1762375

by: David01/04/2024

Greatly improved ride and handling. Had to re-plumb gray tank drain around spring.1707624

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by: Bruce Winslow05/30/2019

Our 28 foot Ford chassis Class A handles like flying a kite with no string. It needed help. I started with the Sumo springs because the description made it sound like I could do them myself. Yep. Job accomplished.
Then, I purchased a front sway bar, which did not come with my motorhome. Got ready for the job and discovered Sumo springs are incompatible with mounting a front sway bar. Had I known…
By the way, we are still flying our kite and having a ball. 15 states and 16,000 happy miles.
But it could be better.649728

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Finally completed my SumoSprings with these rear ones for our 2022 Entegra Vision 29s (Ford F53 chassis V8). A while back, I installed the front SumoSprings and it changed our RV from a “white-knuckling, Nordictrack-exercising, stress-induced-heart-stopping” drive to a…comfortable and sure-footed one.
This time around I installed the rear ones and it complimented the drive even more!! We pull a ~5k lbs utility trailer w/off-road UTV’s and we don’t sway or fishtail as much in the rear anymore! We love SumoSprings!! We have them in ALL of our vehicles!! Highly recommend!
I deducted 1 star for eTrailer. I made the mistake of repurchasing the front SumoSprings again instead of the rears, without triple checking what I bought. I cancelled a minute too late to prevent it from being shipped. Unfortunately, it was shipped and they had to issue me a return label for when it arrives. Thus deducting logistics and restocking fee from my purchase refund.
Granted, it was 100% my fault for the wrong purchase but eTrailer could have given a loyal customer a one time pass.1284480

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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.1027504

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by: Larry 08/25/2023

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.1654198

Quality looks great, on my RV I had to pull the rear tires off to drill the holes for the top mount also cut the body edge to slide the top bolts of the mount so it sits flush with the frame. Have not driven it yet will put an update on change.1291450

The product looks great...and I wish I could install it but it didn't fit on my Ford E450 Super with a Thor "Chateau" class "C" RV. It should fit on a E450 but the way the camper is installed, the point of connection between the camper and the chassis, it is exactly where the Sumo Spring is expected to be installed, And you can't change the mounting location nor can you alter the camper support. I'll have to try to install a less effective spring helper.1552206

I am sure these are very good, the only reason for the low rating is to get attention so no one makes the same mistake like i did.

These DONOT FIT on a 2018 Jayco Greyhawk equipped with the JRide suspension. The Heliwig helper springs are in the way.

etrailer application guide needs to be updated, the picture attached show the Heliwigs are in the way.612717

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by: Andreas E07/27/2020

2017 Newmar Canyor Star: We installed the front & rear SUMO springs and the side-to-side sway improved a lot. Total installation time was less than 4 hours.851600

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We ordered the sumo springs for our 2004 coachmen freedom series. The order came in just a few days as they did when we bought a heavy duty rear stabalizer last year. While I waited for the order ,myself and a grandson put the rear of our rv up on 7500 lb jack stands, two would have been fine but I wanted two more just in case. We took the rear duals off to make the installation easier ,and it was. Instalation went well,only having to move the gas line on passenger side up an inch by moving a clamp.We hoped these would help the light steering issue and related pushing from side when we would get passed on freeway. Not only did it clear up these issues but also quieted the coach down some. All my tests where done at highway speeds with the towed car behind. Thank you again to all at etrailer! Don. Ps. Had issue loading pics will update another time786989

by: Vittorio08/14/2019

These made a huge difference in the drivability and handling of my 2018 Ford F53-based bounder 35K. Highly recommended. And the team at etrailer.com is super responsive and helpful.

I strongly recommend this upgrade, combined with additional/reinforce sway bar. You driving will be more pleasant, less stressful and safer.

- Vittorio 690868

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by: Thomas04/28/2023

These helper springs made an amazing difference in the stability and ride comfort in our coach. Improved cornering and bounce control were immediately apparent. Plus, crosswind driving is much improved. The split design makes leveling easy as I typically raise the front of the coach rather than the rear. Installation is a lot of work, but can be done yourself with the right equipment. Very pleased.1566622

by: Robert06/15/2021

Eliminates a lot of sway from passing semi-trucks and strong side winds, gives a truer sense of driver input and what is happening on the road, feels more solid when you setup for camping- less rocking when you walk from one side of the motorhome to the other or using the steps. Doesn't soften the ride one bit on the Ford frame. It does porpose on uneven pavment like bridge abutments' you have to keep an eye out and slow down. As long as I drive in Florida it's not a problem.
would like to fix it. but not worth ripping everything out and starting over!1065690

by: Thomas 02/21/2023

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.1521924

Sumospring is an excellent product. Very happy with the performance of this product. Installation was not difficult only had to make small adjustments. Sumospring Tech help line was very helpful. Product does as advertised.543326

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by: Clyde S07/03/2019

The Sumo Springs have made the ride on my 2016 Thor Challenger much better. The coach doesn’t lean as much and feels more stable.665928

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by: Arlo05/04/2023

Eliminated trucks pushing as they pass, corners better, handles way better with steering. Worth every penny. Does not improve the ride, however1570628

by: Gary S04/26/2020

I needed to replace the existing Firestone air bags on the rear of my class "A" motorhome and after doing some research on the Sumo springs I opted to try them. The one big advantage right off the bat was I didn't have to worry about air pressure adjustment prior to a trip. This particular kit was a very easy install in that the upper mounting bracket for the Sumo was identical to the existing Firestone air bag mount with the same hole pattern for bolting the new Sumo spring to the frame. The first trip out I immediately noted a more stable ride with less side roll. The whole RV seemed to be planted more firmly to the road. So far I am very satisfied with install of these suspension parts. I look forward to many years of a better ride!
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by: Dane09/20/2021

The springs them selves are great but I just had to replace all the mounting bolts to frame and straighten the bracket as 7 out of 8 bolts broke, 1 bent and subsequently bent the bracket. I just emailed sumo springs and so far they don't care.1157804