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SumoSprings Maxim Custom Helper Springs - Rear Axle

SumoSprings Maxim Custom Helper Springs - Rear Axle

Item # SSR-183-54-1
Our Price: $834.99
You Save: $118.61
Vehicle Suspension

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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. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Maxim Custom Helper Springs - Rear Axle part number SSR-183-54-1 can be ordered online at or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension - SSR-183-54-1

  • Jounce-Style Springs
  • Rear Axle Suspension Enhancement
  • Extra Heavy Duty
  • SuperSprings Intl

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.


  • 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, high-density 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


  • Weight capacity (at 50-percent compression): 7,000 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.

SumoSprings diagram of installation above existing vehicle spring

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 compressing under load

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.

SumoSprings expanding to allow play in the suspension

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-183-54-1 SuperSprings Sumo Springs Maxim Rear Vehicle Suspension Kit for Motor Homes

Installation Details SSR-183-54-1 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

SumoSprings Maxim Custom Helper Springs - Rear Axle - SSR-183-54-1

Average Customer Rating:  4.8 out of 5 stars   (309 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.

2018 Ford F-53

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.


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.


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!


Installed SumoSprings front and back on our 17 36T. They really helped side to side and front to back sway.


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.


2016 Tiffin Allegro Motorhome

Great product.


2023 Ford F-53




2013 Itasca Suncruiser Motorhome



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 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.


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.


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.


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.

Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Which Sumo Springs for 2017 Tiffin Allegro 36UA 26K Chassis
    The SumoSprings Maxim, part # SSR-183-54-1 is the recommended SumoSprings helper spring kit for your 2017 Tiffin Allegro Open Road 36UA with the 26K chassis. It's not necessary to remove the rear wheels to install the # SSR-183-54-1, but it might make things easier as the absence of the wheels will provide more room to work. Since you'll already have existing holes to work with, you can probably get by without removing them if you wish. Whether you remove the wheels or not, the rear...
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  • Which SumoSpring Kit Fits 2019 Ford F-53 Chassis with 24k GVWR
    The SumoSpring kit you'd need for your 2019 Ford F-53 motorhome chassis is the part # SSR-183-54-1 since your GVWR is 24,000 lbs. This will provide you with great suspension support as well as provide you with better handling and stability so it will work well for you. I attached an install video for this kit for you to check out as well.
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    The SumoSprings Maxim Custom Helper Springs - Rear Axle # SSR-183-54-1 can be installed without removing the wheels on your 2014 Tiffin Allegro Open Road 36LA, but it will be more complicated because of restriction working room. I've attached a video to show you the installation which will require mounting the upper bracket to the frame which will require drilling a few holes. It is possible to install without removing the wheel, but having the equipment for drilling holes in close proximity...
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  • Recommended SumoSprings for a 2015 Forest River Georgetown 360 XL
    The gross vehicle weight rating (GVWR) of your 2015 Forest River Georgetown 360 XL on a Ford F-53 chassis is 24,000 lbs therefore, the SumoSprings Maxim Custom Helper Springs part # SSR-183-54-1 is what I recommend for you. These springs will do an excellent job of helping to reduce road shock, minimize sway, and prevent body roll all of which will improve driver control and comfort. The above springs are very easy to install with no cutting or drilling required. They come with a 2-year...
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  • Rear Helper Springs for a 22K or 24K Rated RV Built on a 2015 or 2016 Ford F-53 Chassis
    For an 22K or 24K RV built on a 2016 or a 2015 Ford F-53 chassis you can use rear helper springs # SSR-187-54-1. I have included a link to a video showing an example installation for you. So for this particular part it is the same for either the 22k or 24k rated chassis.
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    Like you said, there are no air bags that fit your 2012 Tiffin Allegro 36LA motorhome. The only rear suspension enhancement that fits your motorhome are SumoSprings: - SumoSprings Maxim Custom Helper Springs # SSR-183-54-1 While SumoSprings aren't adjustable like air bags, they will still give your motorhome enhanced stability. So when you encounter that heavy crosswind, or a truck goes by and your motorhome starts to rock, the SumoSprings will take the brunt of that weight to stabilize...
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    Since your 2006 Georgie Boy Pursuit 2970DS is built on a Ford F-53 chassis that has an 18k GVWR you have two options for SumoSprings and they are both the Maxim line. The part # SSR-184-40-1 which has a 3,000 lb capacity and the # SSR-187-40-1 which has a 2,600 lb capacity.
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    The SumoSprings Maxim kit part # SSR-183-54-1 is a fit for your 2021 Ford F-53 chassis motorhome Entegra Vision XL 36C. This will help a great deal with sway but the best improvement will be with the rear sway bar part # RM-1139-149 as this does the best job at keeping the rear of the motorhome stable and handling properly.
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  • Will Air Lift Air Bags Work on 2015 Ford F-53 Motorhome
    There are air springs that fit your 2015 Ford F-53 2WD motorhome, but they are different than the kit you mentioned. The springs that do fit are the Air Lift LoadLifter 5000 Air Helper Springs # AL57344. Keep in mind these will fit your motorhome so long as it does NOT have a GVWR of 24,000 lbs or 26,000 lbs. If your motorhome has a 24,000 lb or 26,000 lb GVWR then the suspension upgrade you need is the SumoSprings Maxim Custom Helper Springs # SSR-183-54-1. Please note, the SumoSprings...
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Info for this part was:

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