Trailer Life Magazine's SumoSprings Rebel Review

Trailer Life Magazine’s SumoSprings Rebel Review

Gabe Herrera Product Review 13 Comments

The good folks at Trailer Life Magazine inquired about our SumoSprings Rebel. They had a pair of RAM 4×4 duallies towing large fifth-wheels. SumoSprings were installed to help level the trucks, stabilize and smooth the ride. Read the article at!

“With the SumoSprings in place, the front-high attitude was mitigated enough to almost level the truck; load capacity was not an issue, so the SumoSprings had no impact on the weight rating of the axle. Handling with the fifth-wheel attached improved by at least 50 percent, with a noticeable curtailment of wallowing on some roads.”

“SumoSprings in place, the bumpiness was squelched enough to take the edge off the harshness of the ride, making it more comfortable for the passengers. Chucking was not a major issue for either truck, except on certain roads where the SumoSprings reduced the intensity of the pushing and pulling movement.”

Comments 13


    1. Hello there,

      Thanks for contacting us today! My name is Peter. The information you’ve provided is very helpful, but it’s missing one crucial piece; the coach GVWR (Gross Vehicle Weight Rating). All of our SumoSprings kits for the Ford F-53 chassis are specific to three different GVWR classes: 16k-18k, 20k-22k, and 24k-26k

      Here are the front and rear part numbers for each class (2017 Ford F-53/Thor):

      Front: SSF-170-40-2
      Rear: SSR-187-40-1

      Front: SSF-170-40-2
      Rear: SSR-187-54-1

      Front: SSF-173-40-2
      Rear: SSR-187-54-1

      Click on the links next to the part numbers to see additional information including images and installation instructions. Please let me know if you have any questions at all!

  2. We have a 2019 Dodge Ram Big Horn crew cab 4×2 with a short box, 5.7L V8, axle ratio 3.92 and has a max tow package. GVWR is 7100. We’re going to be pulling a 36’ travel trailer that weighs 8380. We noticed a 3” drop on the back bumper when we hooked up to the trailer. We read about Sumo springs in Trailer Life. Do you have a product you would recommend for the truck? TIA.

    1. Hello Michael,

      Thank you for contacting us. Is your Dodge Ram a 3500? I will need to confirm the model of the vehicle before I can provide you your options.

  3. We have a 2018 Thor ACE 32.1 which is on a Ford F53 chassis. I understood that earlier F53’s had holes already in the frame to easily attached sumo springs but that the 2018 F53 does not, requiring holes to be drilled to install the sumo springs. Please confirm.

    1. Hi Ed,

      Peter here, thank you for your question! Yes, for your application, the rear Maxim SumoSprings kit does require some drilling. You can see the installation instructions here;

      Step 7 will tell you exactly what you need to know about the drilling. The part number depends on the GVWR (Gross Vehicle Weight Rating) of your coach, which I can help you with, but the steps are the same.

      What is the GVWR of you coach Ed?

    1. Hi Jim,

      Peter with the Sales and Service Team here. Thanks for reaching out to us! Here are some benefits you can expect to get from SumoSprings:

      Ride Comfort – SumoSprings absorb harsh bumps and jolts to provide a smooth ride over uneven surfaces, highway joints, and other rough terrain.

      Driver Control – By reducing harsh movements, SumoSprings give drivers better control of their vehicle. This increases safety and makes for more comfortable travel.

      Stabilizing – SumoSprings have a progressive spring rate. They start to compress smoothly with less resistance and provide greater resistance as they compress further.

      Your Tiffin is built on a Ford F-53 chassis right? Can you please tell me what the GVWR (Gross Vehicle Weight Rating) is?

      Thanks again Jim!

  4. I have a 2015 Thor Hurricane 27K on the f53 18k chassis. Have already added Roadmaster sway bars front and rear and roadmaster steering stabilizer. Will Sumo Rebels help the harsh ride on California poorly maintained concrete slabs?

    1. Bruce,

      The SumoSprings Rebel kit will help reduce the harshness of the ride on your trips, and the Maxim SumoSprings will help stabilize the rear of the coach and help with better drive control, sway, and provide greater comfort on the coach. The parts that I would recommend would be the SSF-170-40-2 for the front and the SSR-187-40-1 on the rear. I should add that we have encountered issues with fitment on the Thor coaches in the rear of the vehicle. Certain models of Thor RVs have plates welded to the rear frame by Thor that can prevent fitment of the SumoSprings. I always encourage Thor customers to send us pictures of the installation area on the rear of the RV so that our engineers can confirm our parts will work. You can email to me directly at [email protected]

      Please let me know if you have any questions.

      Thank you,

      Mac Tackett

  5. Hi, I have a 2016 F150 3.5 Ecoboost. Max Tow package. I am planning on towing a 28ft 5th wheel camper. Tongue weight of 1390 lbs. Total camper weight 7500 lbs. Debating between the solo 1500 lb sumo or the rebel 3000 lb. What do you recommend? Am I overkill with the rebels? Do either affect the ride more then the other? Would I need the front coil sumo springs too?


    1. Hi Scott,

      Peter here, thanks for reaching out! I actually recommend the Rebel whenever possible. The Rebel is one of our larger unites, but the 3,000 lb. kit (-40/blue density) is the softest Rebel available. This means more material to increase the stability and carrying capacity more than the Solo, but this density is also soft enough to create more of a cushion-like effect to keep the ride quality in tact.

      That being said, the Solo is also a great option and we offer multiple densities for the F-150, but it’s a much smaller unit. Because of it’s size, the Rebel is much more ideal for a truck equipped with a 5th wheel camper.

      As far as adding the Coil SumoSprings to the front; I wouldn’t say you NEED them, as there is no detriment to upgrading only the rear end. However, we do recommend to upgrade all four corners of the suspension when thinking about upgrading one end or the other. Seeing as suspension is a holistic system, the front end works in conjunction with the rear end. I don’t mean to answer your question with another blog post but Adam, Chief Commercial Officer and Head of Marketing, wrote one up on his truck and camper which is very similar to your set-up. Take a quick look here:

      Hope this helps Scott!

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