1. Vehicle Suspension
  2. SuperSprings Intl
  3. Jounce-Style Springs
  4. Rear Axle Suspension Enhancement
  5. Standard Duty
SumoSprings Solo Custom Helper Springs - Rear Axle

SumoSprings Solo Custom Helper Springs - Rear Axle

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2,800-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. Lowest Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Solo Custom Helper Springs - Rear Axle part number SSR-312-54 can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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SuperSprings Intl Vehicle Suspension

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

2,800-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.


  • Helper springs upgrade your vehicle's rear suspension for improved driver control and comfort
    • Keep your vehicle level when you're towing or hauling a heavy load
    • 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
  • 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 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
  • Simple, no-drill installation
  • 2 Jounce-style springs included
  • Made in the USA


  • Weight capacity (at 50-percent compression): 2,800 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • Limited lifetime warranty
  • 30-Day satisfaction guarantee

Rear Suspension Support

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.

Installed spring when it is not compressed

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.

Installed spring when it is compressed

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.

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 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.

SSR-312-54 SuperSprings Sumo Springs Solo Rear Vehicle Suspension Kit for Trucks

Item # SSR-312-54

Installation Details SSR-312-54 Installation instructions

This Product Fits The Following Vehicles

  • 2015 - 2022 Ram 2500 2 Wheel Drive
  • 2015 - 2022 Ram 2500 4 Wheel Drive
  • 2015 - 2022 Ram 3500 Cab and Chassis - 2 Wheel Drive
  • 2015 - 2022 Ram 3500 Cab and Chassis - 4 Wheel Drive
  • 2015 - 2022 Ram 3500 Pickup - 2 Wheel Drive
  • 2015 - 2022 Ram 3500 Pickup - 4 Wheel Drive

Customer Reviews

SumoSprings Solo Custom Helper Springs - Rear Axle - SSR-312-54

Average Customer Rating:  4.8 out of 5 stars   (1039 Customer Reviews)

2,800-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.

- SSR-312-54
2021 Ram 2500

This is my second set of SumoSprings. The first set was on a 2020 Ram Rebel. They fit perfectly on that truck with no space between the spring and the axle. They were much more difficult to install on the Rebel. This set was much easier to install. When I ordered the springs the reviews were split on whether there would be a space between the spring and the axle. I made sure to order the correct pair for my 2021 Ram 2500. New truck for the larger trailer I’m now towing. I received the package very quickly and was surprised at how small the box was. I opened it to find the springs and all the parts in the shipping box along with the pictured instructions. I was slightly perturbed that it appeared to be a return but the parts and springs looked new so I proceeded to install. I placed the setup next to the bracket and realized there would be a space between spring and axle so I called etrailer to check if I was missing a spacer. I also was a bit worried that I ordered the wrong set since the instructions only say 2014-2017 and not 2021. I was told it was designed that way so I decided to give it a try given my experience with the Rebel and installed the springs per the instructions. Took less than 30 minutes total. I used the provided loctite on the set screw and spring. I then drove around a bit and unloaded there is no change to the rear suspension. Going over larger bumps you can tell when the spring begins to engage as there is a little rebound. I then hooked up my trailer. With 815 lbs tongue weight the springs are engaged on the axle and with my WD bars engaged the truck is back to stock rake per the zero longitude angle with the 4x4 page pulled up. I haven’t towed yet but expect it to be similar to my Rebel and I was very satisfied with that performance. I recommend them for your your truck. Especially if you have a Ram.

- SSR-312-54
2020 Ram 3500

I just finished installing the Sumo Springs to my 2020 Ram 3500. The install was super easy. Instruction were easy to follow and the whole thing took less time than I thought. I won’t know how they perform until I pull the 5er out of storage this spring, but I am ready. My only question and the reason for 4 stars instead of 5 was I thought they would sit closer to the axle than they did, may 2” from axle and I would have liked may 1” maybe I could have used another spacer and longer flat head screw to bring it closer but we will see when I put the weight on the truck. I included picks if someone wants to give me their opinion. So far I am really happy with them.

- SSR-312-54

Outstanding service, very prompt. This is my second pair of sumo springs and I love them.

- SSR-312-54

The Sumo Springs are a pretty good product. I have a 2019 Ram 3500 with about 3600lbs of bed payload that tows a Jayco 39-foot fifth wheel RV. When hitched I had about a five or six inch drop in the truck. I have no problem with steering - the only problem I had was going over the "ski jumps" as I call them on bridges along the highways. On the trip down to Florida in November 2020 I bottomed out a handful of times. Enough that it made me want to do something. I considered air but read about these so I tried them and can say I'm very happy with the choice. The Sumo springs take the place of the stock joust bumper. When the truck is empty/unhitched the Sumo springs make no contact with the axle housing. When connected, the springs contact the axle and I experienced no bottoming out.

- SSR-312-54
2015 Chevrolet Silverado 1500

Great Product! I recently put on new Thuren Fabrication rear springs and Fox shocks on my 2016 Ram 2500 4x4 Mega Cab. It gives it a better ride and more suspension travel but you lose some of the weight capacity. After loading the truck for a trip and hooking up the trailer, the back end was sagging. After making it to Wyoming, I ordered the SumoSprings from etrailer and had them in three days. I added the SumoSprings and it is back to normal, even with a load, and I was able to drive home with much more confidence. The ride is still great! Super easy to install, only half an hour total time. Much easier if you can jack it up and pull the wheels off.

- SSR-312-54
2020 Dodge Ram Pickup

Install on my 2020 Ram 2500 was fast and easy. Installed in less than 30 minutes. Only negative ref this product is that it cannot be installed without the spacer. Made my ride much stiffer when not towing. Without the spacer Sumospring would only be engaged while towing my fifth wheel. Have not towed yet, but will next weekend.

- SSR-312-54
2019 Dodge Ram Pickup

When pulling my toys with my 2018 Ram 2500 Powerwagon I had a rocking issue that caused the trailer to sway terribly until I installed the Sumo Springs! Now I tow my 30 foot 5th Wheel camper with a 19 foot boat behind with no issues at all! I love 'em!

- SSR-312-54

Easy installation.

- SSR-312-54

These things are great. A year later and they still work perfectly. Granted, they are not as clean but they still work as designed. They keep the trailer (30' bumper pull) from bucking and it keeps it "toned down" when we hit bumps. It used to bounce and bounce after a bump but now it keeps it in check. I would recommend these to anyone as an alternative to other expensive options. My vehicle is a 2016 Ram 2500 CTD

- SSR-312-54

Bought these springs for my 3/4 ton truck. I was using a 9.5 ‘ slide in Lance camper and they helped immensely. I have since upgraded to a 34’ toy hauler and they are still working great!

Still working great!
Grant M - 05/19/2020

- SSR-312-54

Awesome , thanks guys and gals

- SSR-312-54

Love the springs, great service...I was missing a part when it was shipped and your team expedited it to me.

- SSR-312-54
2015 Dodge Ram Pickup

Easy install big help with loads on my 2015 ram 2500

- SSR-312-54
2017 Ram 2500

Customer service and ordering process was very professional and easy. Product arrived in 2 days. Installation took about 20 minutes total, and they fit exactly as intended. I have yet to tow a trailer with them on, but am picking up my new fish wheel at the end of the week, and am anxious to see how they handle the load.

- SSR-312-54

Love the product but shipping was too l ong!!

- SSR-312-54

Dollar for dollar, for me, they beat air suspension hands down at half the cost.

- SSR-312-54

If they work as good as they look, I an satisfied. Delivery was fast.

- SSR-312-54

Assembly was very straight forward, with little problem. I can not feel a difference in the ride so far with no load. Anticipating a improvement when I load my 5th wheel.

- SSR-312-54

The Product I purchased preformed just exactly a advertised. It took longer to get the truck ready then to install them. My headlight no longer blind the one coming traffic. Great product!!!!

- SSR-312-54

Works out great..., took about 30 mins to install. Best of all..., improved the ride.

- SSR-312-54

Work exactly how the manufacturer said. Easy to install.

- SSR-312-54

Got my springs installed and they work just fine very pleased.

- SSR-312-54

- SSR-312-54
2020 Ram 2500

- SSR-312-54
2019 Ram 2500

Show More Reviews

Ask the Experts about this SuperSprings Intl Vehicle Suspension

  • Best Sway Control Suspension Enhancement for 2015 Ram 2500 With Truck Bed Camper
    When it comes to carrying a truck bed camper, I always go with Timbren Suspension Enhancement Systems over the SumoSprings Custom Helper Springs similar to the # SSR-312-54 . With that being said, I think the better solution for your 2015 Ram 2500 are the Timbren # TDRTT3500E, since they are specifically designed for trucks carrying truck bed campers. The Timbren # TDR2500D would also work but are meant more for carrying heavy payloads and may not provide as much body roll dampening. The...
    view full answer...
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  • Rear SumoSprings Custom Helper Springs For a 2021 Ram 2500 Availability In Black
    First the suspension enhancement systems will not increase your payload it only assists the stock suspension to absorb road shock and maintain a more level ride when hauling additional loads. The SumoSprings Solo Custom Helper Springs # SSR-312-47 are similar to the # SSR-312-54 in design. The # SSR-312-47 springs are black and have a 1,500lb capacity at 50% compression. While the yellow # SSR-312-54 have a weight capacity of 2,800lbs at 50% compression. A heavier duty option is...
    view full answer...
  • Will SumoSprings Solo Custom Helper Springs Soften the Ride In a 2016 Ram 2500
    In order to help you smooth out the ride on your 2016 Ram 2500 I would need some more info from you. For starters, are you using the factory jounce springs? Regardless of which jounce springs you are using, are they engaged/compressed while unloaded? If the jounce springs are engaged/compressed while unloaded then there is a possibility that the SumoSprings Solo Custom Helper Springs part # SSR-312-54 would improve ride quality although if ride quality is your utmost concern then I would...
    view full answer...
  • SumoSpring VS Timbren for 2017 Ram 3500 for Ride Quality and 5th Wheel Towing Support
    Since you really want a good ride quality the SumoSpring Solo # SSR-312-54 is the way to go. This will give you the support you are wanting without making the ride quality harsh like the Timbrens do. Timbrens provide a lot of support but the ride quality (specifically unloaded) isn't great. The SumoSpring option is a much better balance between support and ride quality so it's what you'll be the most happy with.
    view full answer...
  • Recommended Suspension Enhancement Kit For 2021 Ram 2500 With 5th Wheel
    For your 2021 Ram 2500 4x4 I recommend going with the SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-312-54. These jounce springs will do a great job of reducing rear sag and body roll, all while improving the overall handling and braking of your truck. They are rated for up to 2,800lbs which will be enough for your application; this kit is designed to work with 5th wheel hitches so that won't be an issue. The springs will simply replace your factory bump stops and will assist...
    view full answer...
  • Recommended Suspension Enhancement For 2015 Ram 2500 With Factory Air Suspension
    Since your 2015 Ram 2500 has the factory air suspension I recommend the SumoSprings Solo Custom Helper Springs # SSR-312-54 as they are confirmed to work with the factory air suspension system, and will offer 2800lbs of support to your suspension. The best part about the # SSR-312-54 is that it will not negatively effect the loaded or unloaded ride like the Timbren options. Keep in mind that any suspension enhancement options are meant to support your suspension, and will not increase...
    view full answer...
  • How Tall Are the SumoSprings Solo Custom Helper Springs for a 2019 Ram 2500
    The SumoSprings Solo Custom Helper Springs part # SSR-312-54 which are listed as a fit for a 2019 Ram 2500 are listed as 5" tall from the manufacturer.
    view full answer...
  • How Tall are the SumoSprings Solo Custom Helper Springs Part # SSR-312-54
    The SumoSprings Solo Custom Helper Springs part # SSR-312-54 is 6-3/8 inches from the top of the attached mounting bracket to the bottom of the spring where it would sit on the table. I have linked a photo for you to check out showing where Kaitlyn measured for you as well as a photo of it installed. These are confirmed to fit the 2020 Ram 2500 and 3500 trucks.
    view full answer...
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  • Correct SumoSprings for a 2018 Ram 2500
    The SumoSprings Solo Custom Helper Springs part # SSR-312-54 are a great option for a 2018 Ram 2500 and will work well to help prevent proposing while towing. They feature an easy, no drill install and they're made in the USA.
    view full answer...
  • Recommended Springs for a 2015 Ram 2500 Towing a 2015 Dutchmen Denali
    While we do not have any suspension enhancements for the 2015 Dutchmen Denali, we do have some for the 2015 Ram 2500. I recommend the SumoSprings Solo Custom Helper Springs, part # SSR-312-54. They have a capacity of 2800 pounds (more than enough for your Dutchmen's hitch weight), and they are compatible with in-bed hitches. I've linked to a video review of these springs for you to look at. If you do not have a 2015 Ram 2500, let me know and I will find the proper springs for your vehicle.
    view full answer...
  • How to Pick Out Sumo Springs for 2018 Ram 2500 Towing Fifth Wheel Trailer
    Picking the best weight rated SumoSpring for a truck like your 2018 Ram 2500 is typically based on how much of the truck's weight capacity you are using when towing/carrying cargo and how often you would be doing so. So on the high end we have the part # SS27GR which has a 5,000 lb capacity and would be what I'd recommend if you were towing at the capacity of the truck most of the time. But for your application where you aren't towing quite that much the SumoSprings Solo part # SSR-312-54...
    view full answer...
  • Recommended Suspension Enhancement for 2019 Ram 2500
    For your 2019 Ram 2500 the suspension enhancement I recommend is the SumoSprings Solo Helper Springs part # SSR-312-54. This kit will give you the suspension support you are wanting without requiring you to ever inflate any air bags or run any air lines. And unlike some of the other similar suspension kits it won't give you a harsh ride quality when unloaded.
    view full answer...
  • Helper Spring Recommendation for 2016 Ram 3500 With 5th Wheel Hitch
    If you're simply looking for less sag and more support when you're towing your 5th wheel a bump stop replacement suspension helper spring option like the SumoSpring # SSR-312-54 would be a great choice. The SumoSprings won't really come into play until the 5th wheel's pin weight is applied to the rear axle or there's a load carried in the bed of the truck. On the plus side, there's nothing to leak and no maintenance is required. On the down side, the system offers no adjustability, so it's...
    view full answer...
  • Suspension Enhancement Recommendation for 2015 Ram 2500 to Prevent Camper Sway
    For suspension enhancement that helps with body roll a lot of people swear by the SumoSprings. Which for your 2015 Ram 2500 the recommended kit is the part # SSR-312-54 which fits 2WD or 4WD. This will fit your truck and work well with your 2,500 lb camper.
    view full answer...
  • Should SumoSprings Solo Helper Springs SSR-312-54 Touch Axle Of 2018 Ram Power Wagon?
    It sounds like when the SumoSprings Solo Custom Helper Spring # SSR-312-54 you purchased were installed on your 2018 Ram Power Wagon the included spacers were not used. You will need to have the installer remove the helper springs and use the spacers, as they should be very close or touching the axle when the truck is unloaded. The # SSR-312-54 compress easily at first for soft engagement and a less bumpy ride, and do not get stiff until the compress further than they will with the...
    view full answer...
  • Helper Springs for a 2018 Ram 2500 with Factory Air Suspension
    If your 2018 Ram 2500 has the factory 4-corner air suspension system then none of the aftermarket air bag systems are recommended. It is my understanding that the two systems will interfere with each other physically and/or functionally. You could use # SSR-312-54 since it just mounts to the bottom of the frame. I have included a link to the installation instructions and a video review of this system for you.
    view full answer...
  • Suspension Enhancement Recommendation for 2019 Ram 3500 to Reduce Sway
    We have the perfect solution to help reduce sway and body roll on your 2019 Ram 3500 with the SumoSprings Solo Custom Helper Springs # SSR-312-54. This is the best option for your '19 Ram because they have a unique combination of being effective, easy to install and maintenance-free. The SumoSprings Solo Custom Helper Springs # SSR-312-54 will reduce sway while keeping your truck vehicle level and giving you a smoother ride. The SumoSprings are made of a microcellular urethane which...
    view full answer...
    Image 1 for
  • Solution for Rough Unloaded Ride Caused by Jounce-Style Springs on Ram 2500
    The type of experience you're describing is unfortunately the downside of jounce-style springs like the SumoSprings # SSR-312-54 you mentioned for the rear axle of your 2018 Ram 2500. This type of suspension enhancement does a really great job of supporting heavy cargo weight or the tongue weight from a trailer but they can definitely lead to a harsher ride when driving empty. You can try removing the included spacer from your SumoSprings setup (if you installed it) to widen the gap...
    view full answer...
  • Does SumoSpring Solo Kit for 2016 Ram 3500 Fit Dually and Single Rear Wheel Truck
    The SumoSprings Solo part # SSR-312-54 that you referenced fits both the dually and the single rear wheel versions of the 2016 Ram 3500 so it will work great for your dually model.
    view full answer...
    Image 1 for
  • Suspension Enhancements Options for a 2016 Ram 2500
    I do have options for you but they do not make a Coil SumoSprings Custom Helper Spring for your 2016 Ram 2500 at this time. Instead, I recommend using the SumoSprings Solo Custom Helper Springs part # SSR-312-54 which are actually a far superior product in my opinion. The Solo SumoSprings unlike the Coil SumoSprings are not constantly engaged meaning you will not sacrifice ride quality when you are not towing. They will however provide support when you are towing up to 2,800 lbs. They also...
    view full answer...
  • SumoSprings Recommendation for 2015 Ram 2500 Towing 8-9K Steel Trailer
    I do have a solution for you, however the black SumoSprings Solo Custom Helper Springs # SSR-610-47 you referenced in your question are not a confirmed fit for your 2015 Ram 2500. The yellow SumoSprings Solo Custom Helper Springs # SSR-312-54 are a great option for your Ram 2500 for upgrading the rear suspension and keeping your vehicle level. These have a 2,800 pound capacity and the springs will help support the heavy load you're pulling and also minimize sway. They offer progressive...
    view full answer...
  • Help With Trailer Sway
    You could go two different ways here, but as much as I love the SumoSprings # SSR-312-54 , they're not going to work to correct the sway of the trailer once it gets going. Assuming you have electric brakes, the best solution for you is adding an electronic sway control like the Hayes Sway Master Electronic Sway Control System # HA81775 . This system reacts to movement from your trailer to activate your electric brakes and bring the trailer back under control. The installation is fairly...
    view full answer...
  • Compatibility of Helper Springs on 2018 Ram 3500 with Factory Installed Rear Air Bag System
    SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-312-54 will not be compatible with your 2018 Ram 3500 with factory rear air bags. The bump stop location would usually be directly behind where the air bag is present. In talking with the manufacturer, if there is a jounce spring present there, you would be able to utilize the SumoSprings, but if it is not present they can't confirm the fit because they haven't tested it on vehicles without that jounce spring. The Factory Air...
    view full answer...

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Info for this part was:

Employee Leah B
Edited by:
Leah B
Employee Mike L
Expert Research:
Mike L
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Expert Research:
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Employee Andrew K
Video by:
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Employee Jeff D
Installed by:
Jeff D
Employee Robert C
Installed by:
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Employee Dustin K
Video Edited:
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Employee Mary E
Written by:
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Updated by:
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