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  1. Vehicle Suspension
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SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle

SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle

Our Price: $641.99
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Vehicle Suspension

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5,000-lb Capacity. These maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. Each 2-piece spring connects at top and bottom and provides unlimited suspension travel and movement for a smooth, comfortable ride. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle part number SSR-301-47-2 can be ordered online at or call 1-800-940-8924 for expert service.
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SuperSprings Intl Vehicle Suspension

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

5,000-lb Capacity. These maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. Each 2-piece spring connects at top and bottom and provides unlimited suspension travel and movement for a smooth, comfortable ride.


  • 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
  • 2-Piece design provides unlimited suspension travel and movement for a smoother ride when unloaded or on rough terrain
  • 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 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 Jounce-style springs and necessary hardware included
  • Made in the USA


  • 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 pickup trucks. Towing or hauling a heavy load 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 truck'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 factory suspension to level your vehicle, improve driving performance, and keep your ride comfortable.

SumoSprings Rebel installed showing separation of 2-piece springs

The innovative 2-piece design of these Rebel springs allows for unlimited suspension travel. This means that there will be more movement in your suspension when you're unloaded or off-roading, which makes your ride smoother and more comfortable.

Each spring has 2 pieces. One piece attaches to the frame of your vehicle. And the other piece attaches to the axle, typically above your existing factory leaf spring. The pieces come together to provide support when you are towing or hauling a heavy load. When you're unloaded, they separate so that they don't restrict the movement of your suspension. The closed-cell urethane springs also 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.

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-301-47-2 SuperSprings Sumo Springs Rebel Rear Vehicle Suspension Kit for Trucks - 2-Piece

Item # SSR-301-47-2

Installation Details SSR-301-47-2 Installation instructions

This Product Fits The Following Vehicles

Customer Satisfaction Score:

Customer Reviews

SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle - SSR-301-47-2

Average Customer Rating:  4.8 out of 5 stars   (506 Customer Reviews)

5,000-lb Capacity. These maintenance-free microcellular urethane springs upgrade your vehicle's rear suspension. Each 2-piece spring connects at top and bottom and provides unlimited suspension travel and movement for a smooth, comfortable ride.

Dodge Ram Pickup

I like the Sumo Srings on my Ram thirty five hundred thinking about a pair for my fifth wheel trailer.

Dodge Ram Pickup

We have a Ram 3500, carrying a 5000 lb (plus), extremely tall truck camper. The floor sits ABOVE the side rails of the truck bed. I came to the RV dealer, and of course, they would not let me have it till they inspected the truck. It HAD to be a dually to handle street corners. The inspector saw the air bags that the truck dealer had installed and commented that "You will be a lot better off when you buy some Sumo Springs. After one trip cross country, I ordered Sumo Springs, and have not regretted it since. Stabilizes this super high load on corners, cross winds, and general driving. At night, truckers no longer flash their headlights at us. This is the way to go.


Swapped out a set of air bags for a pair of Sumo Springs. The truck now self-levels when I load my slide in camper or other heavy loads. Truck handles better as it's not floating on two balloons. More stability in turns and cross winds.


Easy install. Took me like 30 mins to install. Haven't towed yet...but looking forward to the improvement


Product bolted up as designed. An empty truck ride quality did not change. A loaded truck ride was good and could tell the extra stability they provided.

2019 Ram 3500


The front Sumo Springs made a major difference in the stability of my Winnebago motorhome. It handles the bumps much better without major jarring of the passengers and dampens the side to side motion in turns and under crosswinds.


Sumo springs along with a steering stabizer, new shocks, and oversized sway bars seriously tightens the ride on older model RV with an f53 ford chasis. Long hauls become a lot less strenuous. I also put a memory foam and high density foam seat cushion on the driver's seat. We can travel all over with a lot less fatigue from fighting the wheel and pucker factor from blowing around the road. I took about 3 hours to unstall all 4 sumo springs.


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.


The work great! Was going to go with the Air-Ride air bags in the front but folks had noted that the bags are strained when the leveling pulls the front wheels up to the point of coming off the ground. Glad we went with these. The person I put this on for is Handicap (or Handicapable as she says!) and these do not require air or making sure the pressure(s) are correct and holding.
It was a pain in the butttt get the original jounce bumper off the drivers side, but we muscled through it!! Thanks, Amy, for your help in ordering!! v


Ordered the sumo springs on a Thursday and received them on a Thursday used the on line video they have had had them installed in no time this isn’t the only product I have gotten from them and will continue to use them great service


We have a 2009 build F53 chassis on our 2010 Windsport 32A. I ordered these Sumo springs for the front axle. Hated how bad our coach dashboard would shake and rattle when going over bridge transitions, potholes, and concrete roadway section breaks. Took about an hour and were easy to install alone. Couldn't believe how much these helped the front axle. Worked so well I recently bought a set for the rear axle also. Those are a bit harder to install due to having to drill holes in frame rails to mount the upper bracket and glad I had friend to assist me. Would have only taken a little longer without the help but still easy to do by basic mechanic skills. With having both now we can certainly tell the difference and wished I had bought them sooner.


I think they helped with the side to side roll I put on front and back sumo’s the roadmaster sway bar and front safety steer. Drove from Michigan to Utah . I think the ford f-53 is not a great place to start


A friend and I installed these, if was not difficult to figure out and was a big savings. My wife noticed the difference without knowing it. On a trip to a frequent location she would complain the entire trip after installation on the same trip she did not complain at all. Success!


The installation went very well. The ride seemed smooth.


My THOR motor coach has the Ford F-53 chassis. I rides like a truck. That should not be surprising as "it is a truck." I purchased and installed these Sumo Springs and even though it will never be "air bag" suspension, the Sumo Spring made a wonderful difference in improving the ride. I would recommend this add on to everyone and as I meet similar motor coaches on the road, I show them the Sumo Springs and I do recommend them.


Just Installed my Sumo Rear Springs. They went in real easy on my Dodge Ram 3500. The thing that took the most time on the install was jacking up the frame 3-4" to make enough space between the axle base and top of frame to slip in the entire lower and top sections of the Sumo Springs. Once I did that, I narrowed that space by letting the frame down a little but not all the way. Just enough to catch the receiving spring and leaving a half inch gap between the two sections. This allowed me to easily rachet the bottom u-clap without a problem and keep good alighment. I know I'm going to love this product once I hitch up. No more 2' drop in the rear end once hooking up to my 15k 5th wheel. These springs are stout but no so stout I'll beat the hell out of my body when hunting the rutted roads of the great North West. Thank you Jessie for your expertise and steering me toward the perfect application to meet my pulling and off-road needs.


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.


Preston did a great job helping me spec in the correct springs for my 2016 Thor Hurricane 27K on a F53 chassis. Placed order with him over phone and received springs two day's later. I just installed them and took Motor home on a test drive around town on bumpy streets and what a difference it made. Drives more like a truck now and less like a boat. I also installed a steering stabilizer spring and did the cheap handling fix to the sway bars. Well worth the time and effort. I did notice that the etralier installation video shows the bottom brackets of the spring installed with the "U" down which is opposite the mfg's printed instructions. I did mine according to the printed instructions cause it seemed to make more sense. Probably no big deal either way.
Thanks etrailer. I'll be contacting you guys when ready to do the back end of my motor home.


The product was delivered on time and is installed. The SuperSprings are as advertised. They were a little difficult to install as Winnebago run some cables in the way and were difficult to move.


I really like the improved ride that these SumoSprings made in the ride of my motorhome. I changed out the old style Sumos for these two piece Sumos and would definitely do it again. It doesn't necessarily take away the bumps but it makes them smoother or not as hard of a bump. Also James was very helpful and easy to work with while placing my order and kept me informed on the status of my order.


Immediate improvement in sway control and ease of driving. I installed these in a few hours at my leisure. Did I mention I am 65? 2019 Winnebago Sunstar 35LX


My driver said the ride in his truck improved dramatically with a loaded gooseneck trailer, we'll definitely be getting these for all of our trucks this winter




The Sumo mount had to be slightly modified on the drivers side (removed a 1/2" by 1/2" chunk of the plate) with a grinder to get it to fit on my 2022 f350 4x4. I contacted the manufacturer prior to making the modification. They did not have an issue. The Sumo reduced truck squat (approx 3/4") allowing the truck to ride level with a trailer (8k hitch mount and 17k gooseneck). When you hit a pothole, the impact felt in the truck was jarring and caused the truck to become unstable. The Sumo eliminated this problem. I chose the blue over the yellow after watching a video on etrailer about ride comfort. I added front Sumos after I installed the rear Sumos. The rear provided the a more noticeable improvement. I chose Sumos over air bags because they eliminated air leak maintenance and air pressure adjustments depending on the load.

Show More Reviews

See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Best SumoSprings For 2021 Ram 3500 Towing 5th Wheel Trailer
    Sag is a pretty common problem for trucks towing a 5th wheel trailer, so SumoSprings are a smart idea, and the best option for your 2021 Ram 3500 are the following: - SumoSprings Rebel Custom Helper Springs # SSR-301-47-2 The SumoSprings # SSR-301-47-2 have a 5,000 lb capacity to give your '21 Ram the support it needs when towing. These are going to engage only when you are towing (or otherwise have a heavy load in your Ram's truck bed) so your unloaded ride won't be affected. But when...
    view full answer...
  • SumoSprings Rebel SSR-301-47-2 Appears Mis-Aligned When Installed on 2018 Ram 3500
    Actually, the installation you show in your photos is exactly how it's supposed to be. I checked in with one the engineering folks at SuperSprings who manufacture the # SSR-301-47-2 Rebel Sumo Springs you installed. I forwarded them your photo, and they replied stating that what's shown in your photo is typical of Ram one ton and leaf sprung ¾ ton installs. Rams design of angling forward their rear leaf stacks/ubolts determines the final look of this kit. Their reason for this angling is...
    view full answer...
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  • Would SumoSprings Improve the Ride Comfort of a 2017 Ram 3500 Pulling a Horse Trailer?
    Thanks for the picture! I do believe the SumoSprings Rebel Custom Helper Springs item # SSR-301-47-2 you were looking at will significantly improve the ride comfort of your 2017 Ram 3500. These springs have a two piece design that do not come in contact until weight is put on the rear of your truck. The 5,000 lbs capacity will absorb bumps and road shock while also minimizing sway. This will make for a more comfortable travel experience for you and your horses. Another issue I noticed...
    view full answer...
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  • Will SumoSprings Help Minimize Sag With A 2022 Ram 3500 Towing A 5th Wheel Trailer
    Yes, the SumoSprings Rebel Custom Helper Springs # SSR-301-47-2 you referenced will fit and also help with the sagging you've been experiencing while towing your fifth wheel. These springs offer progressive load control so that you won't have a stiff ride when you aren't towing the trailer like you might experience if you used a Timbren instead. There's no drilling required and the installation is super easy. If you plan to do this yourself be sure to drop the spare tire to give yourself...
    view full answer...
  • Recommended Rear Axle Suspension Kit for 2018 Ram 3500 DRW with 5000-lb Truck Bed Camper
    If you want a rear-axle suspension support kit for your 2018 Ram 3500 dually to help with sag from your 5000-lb truck bed camper, but you do not want an adjustable air bag kit, then I suggest the Super Springs jounce spring kit # SSR-301-47-2. These jounce springs are rated for 4600-lbs, closer to the camper's weight, and like the leaf spring kit it installs without any drilling. These springs will both provide leveling under load and absorption of road shock. Progressive resistance means...
    view full answer...
  • Will Custom Helper Springs Kit Work On 2004 Dodge 2500
    The SumoSprings Rebel Custom Helper Springs - 2 Piece - Rear Axle # SSR-301-47-2 you referenced will work on your 2004 Dodge 2500 pickup. It prevents sagging and reduces bottoming out as a result of carrying heavy loads, like when towing your fifth wheel. It also helps with problems such as off-center loads, body roll, and sway when turning sharp corners because each spring works independently. This product bolts onto your frame and rear axle and requires no maintenance. It provides a...
    view full answer...
  • Which SumoSprings Kit for 2016 Ram 3500 Towing 5th Wheel Camper with Suspension Sag
    I'd go with the lighter duty SumoSprings part # SSR-312-54 if you ever plan to drive the truck without your trailer connected as the ride quality would be much nicer than the higher rated # SSR-301-47-2 that you mentioned.
    view full answer...
  • What SumoSprings will Prevent Sag on My 2022 Ram 3500?
    If you are considering the SumoSprings Rebel Springs # SSR-301-47-2 and the TorkLift StableLoad Suspension Upgrade w Quick-Disconnect # TLA7310S for your 2022 Ram 3500, I recommend going with the SumoSprings. The SumoSprings adjust expand and compress vertically instead of to the sides in order to fully address the sagging issue. The TorkLift suspension, on the other hand, is more of an accessory that is ideal for side-to-side swaying/movement. The SumoSprings are 100% made in the U.S.A....
    view full answer...
  • Will SumoSprings Rebel Helper Springs And TorkLift Stable Load Kit Prevent Sag Of 2020 Ram 3500
    You have a pretty good plan of what you will need to support the suspension of your 2020 Ram 3500 SRW 4x4 Long Bed when carrying your truck bed camper and towing a 10000lb trailer. The SumoSprings Rebel Custom Helper Springs - 2 Piece # SSR-301-47-2 are a great choice as they offer up to 4600lb of support when needed and will not negatively effect your unloaded ride. Adding the TorkLift StableLoad Suspension Upgrade w Quick-Disconnect - Lower Overload Springs - Stainless Steel # TLA7310S...
    view full answer...
  • Suspension Enhancement for 2020 Ram 3500 That Won't be Too Harsh
    For your 2020 Ram 3500 the suspension enhancement kit we offer that provides the best blend of support and ride quality is the SumoSprings # SSR-301-47-2. The Timbrens do a great job reducing sag but they have a reputation as being a bit harsh whereas the SumoSprings are known to be much softer. Now will your ride quality overall get smoother? Since the truck is a 3500 the answer is no, the 1 ton trucks are harsher since they are designed for towing that much weight and there isn't a way...
    view full answer...
  • What Suspension Enhancement Kit for 2012 Ram 2500 will Give Best Ride Quality
    Hey Eric, typically when running the minimum air pressure in a Firestone air bag kit the ride quality isn't affected at all. I am pretty sure you didn't mean to type 5,0000 PSI but in case there was some confusion the minimum PSI is 5 to keep the bags from deforming and damaging themselves. Now if you were running 5 psi and you did still want to go to a different suspension enhancement setup the best option will be the Roadactive kit part # RAS3613-HD for a kit that actually improves...
    view full answer...
  • Compatible Suspension Enhancement For A 2009 Dodge Ram 2500 4x4 With 2 Leveling Kit
    The SumoSprings Rebel Custom Helper Springs # SSR-301-47-2 are a confirmed fit for the rear axle of your 2009 Dodge Ram 2500 4x4 Pickup. The SumoSprings Solo Custom Helper Springs # SSF-302-47 unfortunately will not accommodate a spacer but you can instead use the RoadActive Suspension Custom Leaf Spring Enhancement Kit # RAS3613-HD. These will attach to the leaf spring instead so you won't have to worry about spacer compatibility. Note: The # RAS3613-HD do not fit vehicles with factory...
    view full answer...
  • Will SumoSprings Rebel Helper Springs and TorkLift StableLoad Kit Help With Sag on 2022 Ram 3500
    Since the SumoSprings Rebel Helper Springs and TorkLift StableLoad Kit install in different locations on your 2022 Ram 3500 you can definitely use both at the same time to help out with any sag you might experience under a load. I recommend using the 5K Rebel Helper Springs # SSR-301-47-2 and then you can use the standard StableLoad # TLA7310 or the Stainless Steel StableLoad # TLA7310S. Please note that the StableLoad won't fit if you have the Regular Cab or factory installed airbags. The...
    view full answer...
  • Rear Suspension Enhancement To Reduce Sag When 5TH Wheel Towing For a 2022 Ram 3500
    Yes, the SumoSprings Solo Custom Helper Springs # SSR-312-54 will help to reduce some of the sag you are getting on the rear of your 2022 Ram 3500 when you tow your 5th wheel. These will provide up to 2,800lbs of load support to reduce sag as well as help stabilize the rear of your truck in the turns. The Air Lift LoadLifter 5000 Ultimate Air Helper Springs with Internal Jounce Bumpers # AL88231 will give you the benefit of being adjustable which will allow you to add enough air pressure...
    view full answer...
  • Will Using The SumoSprings Rebel And TorkLift StableLoad Kits Prevent Sag On A 2022 Ram 3500?
    If the rear of your 2022 Ram 3500 is sagging while towing your 5th wheel, supplementing the rear suspension will definitely help. The TorkLift StableLoad # TLA7310 will improve handling by pre-activating your vehicle's factory lower overload springs and helps to evenly distribute weight. The SumoSprings Rebel Helper Springs # SSR-301-47-2 will further this support and will offer 5,000 pounds of supporting capacity when they are compressed to 50%. With that being said, this will be more...
    view full answer...
  • Comparing Timbren Rear Suspension Enhancement System for 2016 Ram 3500 Towing 5th Wheel
    I understand the confusion based on the difference in capacity. The key is the difference in design. The Timbren Rear Suspension Enhancement System # T94VR is designated as a Severe Service kit so the springs are always engaged. Although the capacity is slightly lower at 8,000 lbs, the design is intended for a constant heavy load like a salt spreader or in-bed camper. Based on the frequency of your towing you want the Timbren Rear Suspension Enhancement System # TDR3500CA. These have...
    view full answer...
  • Cost-Effective Way to Tow 5th Wheel With a 2016 Ram 3500 Short Bed Pickup
    After installing the B&W Turnoverball Underbed Gooseneck Trailer Hitch # BWGNRK1314 on your 2016 Ram 3500 I recommend using the Convert-A-Ball Cushioned 5th-Wheel-to-Gooseneck Adapter w/ Offset # CAB-C5GX1216. This installs directly on your pin box, has an offset of 7-1/2", and will be more cost-effective than the Anderson gooseneck adapter. For a cost-effective suspension enhancement I recommend the SumoSprings Rebel Custom Helper Springs # SSR-301-47-2. This will give you the support...
    view full answer...

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