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  1. Vehicle Suspension
  2. SuperSprings Intl
  3. Bump Stops
  4. Towing/Load Leveling
  5. Light Duty
  6. Rear Axle Suspension Enhancement
THIS ITEM IS NOT A FIT FOR
2018 Jayco Redhawk Motorhome
SuperSprings Intl

SumoSprings Custom Helper Springs - Rear Axle

Part Number: SS28FJ
In Stock
$444.99
Vehicle Suspension
Not Confirmed to Fit

2018 Jayco Redhawk Motorhome

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Upgrade your vehicle's rear suspension with these maintenance-free helper springs. They smooth out bumps, reduce sway, and help keep your vehicle level when towing or hauling. Durable urethane design installs easily with no drilling required. Great Prices for the best vehicle suspension from SuperSprings Intl. SumoSprings Custom Helper Springs - Rear Axle part number SS28FJ can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (32)
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  • Videos (1)
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SuperSprings Intl Vehicle Suspension - SS28FJ

  • Bump Stops
  • Towing/Load Leveling
  • SuperSprings Intl
  • Light Duty
  • Rear Axle Suspension Enhancement
  • Suspension Only

Upgrade your vehicle's rear suspension with these maintenance-free helper springs. They smooth out bumps, reduce sway, and help keep your vehicle level when towing or hauling. Durable urethane design installs easily with no drilling required.


Highlights

  • Custom Fit for Your Vehicle: Mounts to existing attachement points.
  • 1,800-lb Capacity: Enhances rear suspension, leveling your ride for safe towing.
  • Progressive Load Control: Adjusts support based on load weight for optimal comfort.
  • Minimize Sway: Stabilizes your vehicle while towing heavy trailers for improved handling.
  • Support for Uneven Loads: Independent springs balance off-center loads, reducing body roll.
  • No Maintenance Required: Unlike airbags, does not need air pressure monitoring.

Features to know about

Level Your Load: Progressive Load Control Springs

Whether you're hauling weekend gear or towing a small trailer, these springs adapt to the load. Light cargo compresses them slightly for a soft ride, while heavier loads activate more resistance - keeping your truck level and your drive predictable.

Conquer Rugged Terrain: Maintenance-Free Microcellular Urethane

Designed to handle harsh environments, the closed-cell urethane resists road salt, oil, and UV damage. With no air lines or fittings to worry about, its a "set it and forget it" solution built for year-round reliability.

Smooth Out the Ride: Absorbing Bumps and Shocks

Hit a pothole or a rough stretch of road? These springs act like a cushion between your frame and axle, soaking up impact to reduce jarring and minimize bounce. It's a small upgrade that makes a big difference in comfort.

Handle Uneven Loads: Independent Spring Action

Carrying a tool chest or cargo that sits off to one side? Each spring works on its own to manage side-to-side movement and reduce body roll during turns, giving you more control on the road.

Proudly Made in the USA: Trusted Quality, Built to Last

These springs are manufactured in the United States with high-grade materials and strict quality standards. They're backed by a limited lifetime warranty for confidence that goes the distance.

Specs

Weight Capacity

  • Weight capacity: (at 50-percent compression): 1,800 lbs
  • SumoSprings will not increase your vehicle's weight-carrying capacity

Warranty

  • Limited lifetime warranty
  • 30-Day satisfaction guarantee


SSR-634-47 SumoSprings Custom Helper Springs - Rear Axle - Solo

Installation Details SS28FJ Installation instructions

This Product Fits The Following Vehicles




Video of SumoSprings Custom Helper Springs - Rear Axle

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.




Video Transcript for Review of SuperSprings Intl Vehicle Suspension - SumoSprings Rear Axle Helper Springs - SS28FJ

Hi, everybody. Andy here with etrailer.com. Let's take a real quick look at the SumoSprings rear axle custom helper springs. Now this kit is designed to fit your 2024 and newer Toyota Land Cruiser and Tacoma. Then your 2022 and newer Lexus LX 600. And then finally your 2023 and newer Toyota Sequoia.

On custom fit parts such as these helper springs, I do recommend taking advantage of our vehicle fit guide here at etrailer.com. Simply input the year, make, and model of your vehicle and our fit guide will confirm if this set will work for you or if we have something comparable that will work for you. So whether you're hauling weekend gear or towing a small trailer, these springs are going to adapt to the load. Light cargo is going to compress them slightly for a soft ride while heavier loads are gonna activate more resistance, keeping your truck level and your drive predictable. Now these do have a weight capacity at 50% compression of 1,800 pounds, but do be aware of the fact that these springs do not actually increase your vehicle's weight carrying capacity.

And these are designed to handle the harsh environments. The closed cell urethane is going to resist road salt, oil and UV damage. And then with no air lines or fittings to worry about, this is basically gonna be a set it and forget it solution built for year-round reliability. So that's what's great about SumoSprings. So if you hit a pothole or a rough stretch of road, these springs are gonna act like a cushion between your frame and axle, soaking up the impact to reduce jarring and minimize bounce.

It's, relatively speaking, a small upgrade, but you know it's gonna make a huge difference in comfort. So if you're carrying a tool chest or cargo that's gonna sit off to one side, each spring is going to work on its own to manage that side-to-side movement, it's gonna help reduce body roll during turns, giving you more control on the road. So you are gonna get these custom fit brackets that I have loosely attached to the springs, and then the hardware to get this installed onto your vehicle with some Loctite. And then instructions to guide you through the installation process. If you do pick this kit up, we would love to hear back from you regarding your experience with getting these installed and using them.

So you can share your experiences with us by dropping a comment or leaving a review on this product page. And if you have any other additional questions, don't hesitate to reach back out to us via phone, email, or chat. We do wanna make sure that you get exactly what you want and need. Well, I think that's gonna wrap up our quick look today. I do hope that it was helpful for you. Again, my name is Andy. Thank you for joining me.

Ratings & Reviews

4.9

32 reviews
Upgrade your vehicle's rear suspension with these maintenance-free helper springs. They smooth out bumps, reduce sway, and help keep your vehicle level when towing or hauling. Durable urethane design installs easily with no drilling required.

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They really improve the cornering, and trailer sag.
If your at all a DIY person you'll have no problem installing these helper springs.
The only reason I don't give them a five star review is that their just installed andvI want to see how they hold up.



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Instruction could be a little more deta iled.



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Always great customer service and speedy delivery.
SumoSprings easy to install, no issues.



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Very easy to install. Will keep my Tundra from squatting too much when I tow.



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Added 2” spacers on each side so the Sumosprings touch my frame. Relatively easy to install, but centering on the frame was a challenge as the directions tell you to touch the wire harness bracket. I elected to be slightly off center so the bracket did touch to prevent movement and wire damage. Also, once initial installation is performed, you must remove to tighten, which is not in the directions. Overall, the ride has not changed at all and it helps eliminate the drop from my trailer. Highly recommend!



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Very fast delivery. So far so good.



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Always the fastest shipping, outstanding customer service and high quality products.



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Received very quickly. Exactly what I wanted and ordered. Thank you!!!



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Very easy to install and worked well.



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Easy to install, so far truck pulls the trailer much better.



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Great product, fast shipping!!!!



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Good product unfortunately it did not solve my ride issue but not at fault of the helper springs. Just bad engineering by GM. The helper springs were very easy to put on, less than an hour to put both front and rears on.



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Package arrived intact only 5 days after ordering. Contents undamaged and well packed. On my new 2024 Toyota Tundra the installation was very simple, straight-forward and easy. In my garage I raised the rear of the truck with a floor jack, gathered my tools and started about 45 minutes after the package arrived. Took me about 20 minutes on the drivers side because I lacked any previous experience with this product. Only took about 10 minutes for the passenger side because I was more comfortable after doing the drivers side. I didn't even have to remove the rear tires. Keep in mind that I am a very mechanically inclined yet 68 year old guy laying on a creeper underneath a wet truck. The mounting brackets are very heavy-duty and thickly painted. Actually heavier duty than the originals. Bolt holes in the brackets were exact matches for my Tundra. After lowering the rear of the truck back down there is still approx. 3/4" clearance ( previous 6" clearance measured at the original factory bump-stops prior to removal) between the bottom of the Sumo helper and the axle rest. This is about the amount of clearance I was hoping for---make contact at about 5-1/2". Leaves me about 3/4" free travel during everyday, unloaded driving. Without the Sumo's my truck sagged 3" with 575 lbs camper tongue weight. Raining outside so I'm not going to hook up my camper just to measure the difference today. However, if it now sags even 1 to 1-1/2" less than before, I'll be a happy camper (pun intended).
I gave this a 5-star rating because I received everything exactly as advertised. Also because I can see how this product will absolutely make my camper-towing experiences much more pleasant and safe. And the Limited Lifetime Warranty certainly was a factor. I usually don't take time to write reviews but I was so impressed with the overall quality of this particular product and the ordering process that I felt I owe them that much as a tip.



by:

Easy to follow instructions. Maybe 45 minutes to install using no power tools. Use an 18" long extension on a deep socket allows you to tight U-bolt nuts without removing the wheels. Otherwise plan on removing the wheels to make your life easier. Also the driver side is the tighter space to work in. Do that side first. Passenger side is super easy and a great way to finish the project.

Haven't towed the camper yet to see if it reduced the squat or not.


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See what our Experts say about this SuperSprings Intl Vehicle Suspension

  • Will Firestone Coil Helpers For 2025 Toyota Land Cruiser Also Fit A 2025 4Runner
    Hello Peter, thanks for reaching out. While the vehicles may be similar, the Firestone coil helper kits for the 2025 Toyota Landcruiser will be different from the kit for a 4Runner. Firestone is currently working on a new kit for the 2025 4Runner, but it is not available quite yet. If you are looking to beef up the suspension on your 2025 4Runner, consider the following: - Firestone Coil-Rite Air Helper Springs - Rear Axle - Preorder # F25VV - Timbren Rear Suspension Enhancement System...
    view full answer...
  • Where Can I Find Instructions For SumoSprings On My 2024 Toyota Land Cruiser?
    Hey Edward, The correct SumoSprings for your 2024 Toyota Land Cruiser are # SS28FJ. They are a no drill installation and I have attached the instructions below for you to see how they install. It is fairly simple, just removing the factory bump stops and installing these back in place. Feel free to let me know if you have any additional questions about the install. Do you tow with the land cruiser or just looking for additional support?
    view full answer...
  • Are the Coils the Same in the Toyota 4Runner as the Land Cruiser? What do Carry 25 Land Cruiser?
    Hello Peter, No, the Toyota 4Runner and the Land Cruiser do not use the same coils. We do have a great option that is maintenance free for your 2025 Toyota Land Cruiser, the SumoSprings Custom Helper Springs - Rear Axle # SS88FJ which has a 1,400 pound capacity at 50 percent compression. If the 1,400's are not going to do it for you, we also have them in a 1,800 pound at 50 percent compression # SS28FJ. What kind of load are you hauling that you are needing the airbags for?
    view full answer...

Do you have a question about this Vehicle Suspension?


Info for this part was:

Employee Katherine B
Edited by:
Katherine B
Employee Alex H
Written by:
Alex H
Employee Andy C
Installed by:
Andy C

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