SumoSprings Maxim Custom Helper Springs - Rear Axle
Item # SSR-106-47-1
Retail:$833.76
Our Price: $791.99
You Save: $41.77
Confirmed to Fit
2012 Thor Four Winds Motorhome
19G
23U - Ford
25C - Ford
28A - Ford
28Z
31A
31F
31K
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2012 Thor Four Winds Motorhome - SumoSprings Maxim Custom Helper Springs - Rear Axle
- Jounce-Style Springs
- Rear Axle Suspension Enhancement
- Heavy Duty
- SuperSprings Intl
5,000-lb Capacity. Maintenance-free microcellular urethane springs upgrade your Thor Four Winds Motorhome'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:
- Helper springs upgrade your vehicle's rear suspension for improved driver control and comfort
- Support heavy rear loads to keep your vehicle level
- Help to absorb bumps and shocks
- Minimize sway
- Progressive load control - springs compress according to the weight of your cargo
- Lighter loads - springs compress easily at first for soft engagement and a less bumpy ride
- Heavier loads - springs compress by as much as 80 percent for support
- Springs work independently from each other to compensate for off-center loads and reduce body roll during sharp turns
- Springs are connected to your vehicle at top and bottom to provide support even when your vehicle is unloaded
- Expand up to 50 percent of their height
- Durable microcellular urethane
- Works in temperatures from -25 F to 200 F
- Resists damage caused by oils, road salts, and UV rays
- Minimal lateral expansion - springs expand and compress vertically instead of to the sides so they aren't easily damaged when operating in tight spaces
- Maintenance-free - no tubing to run or air pressure to monitor like with air springs
- Easy bolt-on installation
- 2 Springs and necessary hardware included
- Made in the USA
Specs:
- Weight capacity (at 50-percent compression): 5,000 lbs
- SumoSprings will not increase your vehicle's weight-carrying capacity
- Limited lifetime warranty
- 30-Day satisfaction guarantee
Rear Suspension Support
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.
Durable, Custom-Fit Springs
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.
SSR-106-47 SuperSprings Sumo Springs Maxim Rear Thor Four Winds Motorhome Suspension Kit for Motor Homes - Medium Duty
Replaces SSR-106-HD
Installation Details
Customer Satisfaction Score:
73% were satisfied with this product
27% of customers were not satisfied
- Wrong item was ordered
- etrailer mistake
- Product did not meet expectations
Customer Reviews
SumoSprings Maxim Custom Helper Springs - Rear Axle - SSR-106-47-1
Average Customer Rating: 4.8 out of 5 stars (316 Customer Reviews)
5,000-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.by: Bruce03/18/2019
2018 Jayco Greyhawk Motorhome
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.
by: Mark 09/29/2023
2014 Ford F-350, 450, and 550 Cab and Chassis
quick delivery product worked great
by: Cody N07/08/2018
2018 Ford E-Series Cutaway
2019 Thor Outlaw 29J I've only driven this RV for about 1800 miles.
I don't know if I could rate these any higher. I ordered both the front and rear Sumosprings and the fronts arrived earlier than the rear, so I went ahead and installed them and went for a 100 mile test drive. Night and day difference, no more harsh ride in the front, and a lot less pogoing. Now I can't wait until the rears come in and I can test those.
by: Vic Long04/22/2020
Ford
The use of this Sumo springs has greatly cut down the sway of Thor Chateau motor home with Ford E350 chassis. Very glad to have installed them. Strongly recommend them for any RV’er who has difficulty with driving any motorhome due to sway.
by: Michael09/16/2020
Added these rears and also did fronts at the same time. Did the install myself. Took longer than I thought it would, but not bad if you have some mechanical ability. If you do be very careful while drilling the holes on the drivers side as the instructions state, the brake lines are right there and if you don’t put some kind of block between the lines and frame you may damage those lines. Adding the front and rears has improved the handling of driving our motorhome greatly. Just drove 800 miles since installing and the stress from driving was so much less. Hardly noticed the winds and semi’s. Would recommend this product.
by: Larry 08/16/2020
A bit harder to install with the dual tires on but followed the instructions and had no issues with the installation. Felt the difference the first time out. Courtney was great to work with, recommend that you go to her for help.
by: Thomas 06/23/2020
ordering and shipment were spot on. I have not installed the product yet.
by: Mike08/21/2020
Fronts install fairly easy... Rears came with one "Tang" bent, but a hammer took care of that...
by: Dominic12/02/2021
Great service and communication. Quick delivery!
by: Robert 03/24/2024
by: Jeffrey 01/21/2022
by: Michelle 08/31/2021
by: Richard05/10/2022
by: Chuck 06/08/2021
2021 Ford E-Series Cutaway
by: 09/09/2022
by: Frank S05/12/2023
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.
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!
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.
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.
by: David01/04/2024
Greatly improved ride and handling. Had to re-plumb gray tank drain around spring.
by: Rex05/02/2021
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.
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.
by: Joseph 01/17/2024
Great product! Really helps the improve the ride in my Bounder. These should be standard on all RV's!
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.
by: ASE CerTech04/11/2022
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.
25
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Condition: Installed
Notes: Item has been installed/test fit.
Info for this part was:
Expert Research:
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Expert Research:
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Updated by:
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Updated by:
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Video by:
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Installed by:
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Thomas
6/24/2021
Works very well.