Which SumoSprings Density (color) is Right for You?

Which Density is Right for You?

Peter Product Information 19 Comments

Why are SumoSprings different colors?

The different SumoSprings’ colors identify their density. SumoSprings come in three different densities: blue SumoSprings are -40, black SumoSprings are -47, and yellow SumoSprings are -54.

Blue – 40

Blue -40 density captures more air in the millions of micro-cellular bubbles, creating an air spring suitable for light and medium duty applications.

Black – 47

Black -47 density balances the amount of urethane and air bubbles to create an air spring suitable for light, medium, and heavy duty applications.

Yellow – 54

Yellow -54 density traps a smaller amount of air in the air spaces creating a more dense air spring suitable for medium and heavy duty applications.

Class A Motorhome Applications

For Class A motorhomes built on the Ford F-53 chassis, our engineers have made the selection process simple. For the front, the most beneficial SumoSprings kit, and sole option, is the -40 (Blue). For the rear, you will see either the -40 or the -54 (Yellow). The density for rear kits primarily depends on the coach’s GVWR. The -40 is listed for 16k-18k coaches, while the -54 is listed for 20k-26k coaches.

Recreational and Commercial Applications

For all other applications, whether commercial or recreational, the options can broaden, making the decision just a bit more tricky. Something to keep in mind, is the fact that not every density is available for every application. On the other hand, some applications list all three densities as a viable option. So, in the case where you have multiple densities to select from, which density is right for you?

What are you trying to accomplish?

The main question to ask yourself is, “What are you trying to accomplish by enhancing your factory suspension?” Say the main goal is comfort and ride quality. You may not be towing or hauling additional weight with your Toyota Tacoma, but a smoother ride over potholes, speed bumps, dips, driveways, etc., on your way to the grocery store would make for a much more enjoyable driving experience. This is an example of a light duty application; -40 is the recommended density. The -40 captures the most air of the three densities, creating a soft cushion effect.

Okay, let’s step it up now. You’re still after the comfort, and ride quality, except now you own a boat you would like to tow to the lake once a month. Towing something relatively small may not seem like an issue for your vehicle, but if it is experiencing rear-end sag, there are a few negatives to think about, including premature wear on original components. A boat is just one example. You may be hauling a motorcycle, a jet ski, or an ATV. This is perfect for the -47, recommended for light and medium duty applications. The -47 is a great solution for Class B and Class C motorhomes as well. The balance of urethane and air bubbles is appropriate for medium to heavy duty applications. An example here might be a Mercedes-Benz Sprinter based motorhome.

Last but not least, the -54. The -54 traps the least amount of air, out of all three densities. This makes for a more dense air spring, suitable for commercial use, or motorhomes on the heavier side. Although SuperSprings are more common in commercial applications, SumoSprings can be an option as well. Using both SuperSprings and SumoSprings is the preferred choice for commercial applications.

Comments 19

  1. Post

    Hi there!

    Thank you for your question.
    We actually do not perform installations at our factory. You are more than welcome to stop by and place an order, or pick some SumoSprings up if you place an order on our website though. If you already have them however, we can assist with finding an installer near you. Either way, let me know so we can help you get some SumoSprings on your motorhome!

  2. I recently purchased a 1988 Minnie Winnie Winnebago. Please provide me application info for a suspension upgrade. Vehicle has 60K miles. Thank you.

    1. Post

      Hi Joey,

      Thank you for inquiring about SumoSprings. I’ll need a bit more information from you, in order to ensure the proper recommended part numbers. Can you please let me know the year, make, and model of the chassis your Winnebago is built on top of?

  3. I’m considering adding rear sumosprings and front coil sumosprings to my 2019 Winnebago Travato 59KL. I understand that you can gain a slight increase in rear ground clearance of around 1-1.5 inches. I also understand that a smoother ride with an increase in stability and control can be gained. My question is which density of sumosprings should I have installed? GVWR IS 9350 lbs — 4630 lbs-front/5291 lbs-rear. Occupant and cargo carrying capacity (occc) is approximately 1900 lbs. GCWR is 11500 lbs.

    1. Hi Steve, we have spent time communicating with a lot of Travato owners. Quite honestly, both the SSR-313-47 and SSR-313-54 have great reviews. The more popular seems to be the -54 amongst Travato owners, but everyone has their own personal preference. I would encourage you to ask fellow Travato owners. They have a great Facebook Group community you can join. They also have a website with resources, including an in depth FAQ on SumoSprings. I encourage you to check it out, as it will help answer your question: https://travato.group/wp-content/uploads/2017/10/Travato-and-SumoSprings-FAQ.pdf. In response to your comment about ground clearance. Remember, we are not lifting your van, we are reducing the amount of sag. So, yes. Travato owners do report varying ground clearance increases, but, it varies depending on the amount of weight causing the sag, and the age of the spring pack assembly. Hope this resource helps. Please feel free to give me a call in the office or email to discuss further.

  4. I have a 2015 tundra 8 ft bed double cab. about 5 times a year a I haul a load of firewoodl I can feel suspension bottom on bumps. truck sags but actually handles fairly good. would yellow be overkill or would I be happier with black?
    Thank you.
    Mark Rogers

    1. Post

      Hello Mark,
      Thank you for your question. The material of the -54 density is more suited for commercial, or heavier applications. Since you only haul about 5 times a year, I’d say the -54 would be a bit more than what you need. Especially during all the time you aren’t loaded with the firewood. This is why I recommend the SSR-610-47 instead https://www.supersprings.com/shop/SSR-610-47/
      Let me know if you have any other questions!

  5. I am thinking about adding some springs to a 2011 Ford Thor Freedom Elite Class RV / E350 chassis. I have done some improvements to help with steering wandering. I changed all shocks to Bilstein HD, added a front sway bar, and steering dampner. The rear is factory sway bar. I believe my gross weight is 11.5K. I have not weighed my coach loaded up. I was thinking of air bags since the rear seems to sag but was interested in sumo springs. The Rv has about 35k miles.

    1. Hello Pat,

      Thank you for your question.

      We have some great options for both the front and the rear of your coach.

      Front – SSF-106-40

      Rear- SSR-106-40-1


      Rear- SSR-106-47-1

      The SSR-106-40-1 is designed to provide great stability as it attaches to both the frame and axle. It is also made from our light duty density SumoSprings (Blue) so it will give you a soft feel to the ride.
      The SSR-106-47-2 is a great option if your RV is fully loaded and you tow behind it as well. The SSR-106-47-2 is made of our medium duty density SumoSprings (Black) provides a 4,600 pounds capacity at 50% compression and will also give you a soft feel to the ride as well. The difference in this case of the feel of ride between the -40 & -47 is minuscule.

      There is a caveat as you will need to have a minimum of 7″ of clearance from the side wall of the tire to the frame.

      If that is the case these two will be your best options.

      If not, we can further discuss other options for the rear at least.

      Please let me know if you have any questions!

  6. Hi , I have a 3/4 ton f-250 which playload is between 3500 and 4000 pounds, how ever I’m putting a truck slide in camper which weight is close to 2000 pounds! On this case witch color of spring you recommend? “Camper goes on top of truck”!

    1. Post

      Hello Sid,

      Thank you for contacting us. The part number also depends on the year of your truck. We tend to recommend the -47 SumoSprings for recreational applications, and the -54 SumoSprings for commercial applications. However, there are a few examples of the -54 being more popular even in recreational applications (Mercedes-Benz Sprinter, Dodge ProMaster). What is the year of your Ford F-250?

  7. Hello,

    I have a 2009 Freightliner Sprinter 3500 Dually. It’s used as a shuttle and has a capacity of 17 passengers. I would like to provide a better ride for my clients, less bumpy and smoother ride. We are not always at capacity so I am not sure what is a good balance in choice of product to add. I’m afraid that a to rigid product will be bad for a less loaded shuttle. It does not have the 2 inch additional block on the axle and it has an all stock suspension. What’s your recommendation?

    1. Angel,

      Thank you for your question.

      For your passenger van we have SumoSprings for the front and rear.

      Front – SSF-106-40

      Rear- SSR-338-47

      These two parts are used on RV’s made to provide better stability and ride comfort. Since your passenger van isn’t as loaded as an RV would be. This kit will for allow for an even better stability.

      Please let me know if you have any questions.

  8. 2000 dodge ram 2500 2wd. I pull a 8300 lb travel trailer. Would the sumospring help the ride and if so which one would be the best?

    1. Post

      Hello Roger,

      The earliest year SumoSprings are available for a Dodge Ram 2500 is 2003.

      However, SuperSprings can still assist, especially with load-leveling ability. As a by-product of the design, SuperSprings also reduce sway by up to 30%, definitely beneficial to the ride.

      If your truck does not sag while hooked up to the trailer, I recommend going with SSA40

      If it does sag, then I recommend SSA22

      Please let us know if you have any questions at all.

  9. Thanks for the informative write-up. Towing vehicles is something that always requires great suspension, so we’re always looking to enhance when it makes sense. Cheers.

  10. I have a 2016 tacoma four door long box that I am considering putting the Sumo rear springs on. I occasionally haul a heavy load of firewood or building materials maybe two or three times a year. I want to still have a good ride when empty but would like to reduce sway with a heavy load. Would you recommend the 612-40 or the 612-47 springs

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