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SumoSprings Solo Custom Helper Springs - Front Axle

SumoSprings Solo Custom Helper Springs - Front Axle

Item # SSF-106-47
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SuperSprings Light Duty Vehicle Suspension - SSF-106-47
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1,000-lb Capacity. Upgrade your vehicle's front 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. SumoSprings Solo Custom Helper Springs - Front Axle part number SSF-106-47 can be ordered online at etrailer.com or call 800-298-8924 for expert service.
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SuperSprings Vehicle Suspension - SSF-106-47

  • SuperSprings
  • Jounce-Style Springs
  • Front Axle Suspension Enhancement
  • Light Duty

1,000-lb Capacity. Upgrade your vehicle's front 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 front suspension for improved driver control and comfort
    • Support heavy front-end loads to keep your vehicle level
    • 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 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): 1,000 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • 2-Year limited warranty

Front Suspension Support

A heavy front load can cause front-end sag as your factory suspension compresses under the weight of the load. This means that the front 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 rear axle, your rear 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 front 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 rear 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.

SSF-106-47 SuperSprings Sumo Springs Solo Front Vehicle Suspension Kit - Heavy Duty

Installation Details SSF-106-47 Installation instructions

This Product Fits The Following Vehicles

Customer Reviews

SumoSprings Solo Custom Helper Springs - Front Axle - SSF-106-47

Average Customer Rating:  4.7 out of 5 stars   (449 Customer Reviews)

1,000-lb Capacity. Upgrade your vehicle's front 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.

- SSF-106-47
2018 Thor Axis Motorhome

Can’t eat Etrailer products and service 559621

- SSF-106-47

Great product. Very easy to install. I installed Sumo springs front and rear on my class C Sprinter-based RV (Winnebago View) as part of a suspension upgrade to improve handling in cross winds. The other suspension upgrades included a Hellwig rear sway bar and Bilstein rear shocks. The handling improvement was dramatic. No more sway when being passed by semi’s and much, much better handling in cross winds. I am very happy with the Sumo springs. 656765

- SSF-106-47
2017 Mercedes-Benz Sprinter

I got the typical on time delivery from etrailer and the product arrived and appears as displayed on their webpage. I installed these on a Jayco Melbourne 24L motor home (2018 Mercedes 3500 Sprinter) with no problems. One small error in the manufacturers instruction sheet suggests using a 10mm socket to remove the stock bumpers prior to installing these. It is actually a 13mm you need. I bought these as part of a plan to reduce sway in this motor home. I figure these are part of an overall plan incorporating them with at least two other products. I have also installed a beefier rear sway bar and am considering one other piece to improve handling. These by themselves help but do not solve the whole performance improvement I am seeking. 577165

- SSF-106-47
2017 Ram 2500

Installed these on a 2017 Mercedes 2500 Sprinter/2018 Roadtrek SS Agile. I already have these on the rear where they work great reducing sway and bounce, wanted the same handling in the front.. I found it much easier to remove the wheel to access the nut holding the bump stop in place and to place the Sumo Spring in position. Overall an easy install. 658576

- SSF-106-47
2017 Fleetwood Jamboree Motorhome

Without a doubt - excellent product. With research you will find that the Ford E450 rubber bump stops are installed using metric while the Sumo product goes on with standard. The passenger side rear had a bracket attached holding brake lines so using a washer was out of the question. Overall they went on easily and when tested made turning so much more comfortable. Top used to sway so much, now WOW! I should have done this when I first bought the rig. Thanks Sumo and etrailer! 605554

- SSF-106-47

It was interesting to note the height of the OEM versus these springs - these are much longer. I installed these front springs and the rear springs together and they significantly reduced the roll in my class B rv. I was able to install these myself and, at least for me, it was a lot easier using a second person to hold the spring in place below while I installed the retaining nut above. I used the appropriate jack and jack stands. 591696

- SSF-106-47

Huge improvement, thor vegas does not roll nearly as much during turns. A lot less wobble when driving. Well worth it. Took 30 min to install. 589377

- SSF-106-47
2018 Subaru Forester

This was a very easy install. It took less than an hour. I installed them on a 2018 Forest River Forester which is on an E450 chassis. My rig is equipped with Firestone airbags in the back so I only needed the Sumos in the front. I’m looking forward seeing how they improve the handling of my RV. I haven’t ventured out on the road. 538371

Great product. Really helps with front end sway. My Class C RV handles well. Sumo Springs have really paid off.
Creeker J - 07/05/2019


- SSF-106-47

I should have purchased years ago (around 2014) when I installed similar package on my E450. Installed SSF-106-47 on my 2007 GMC 2500HD Classic 2wd, Ext Cab pickup. Mostly my weekend (go to the toy store - Lowes/Home Depot) pickup. This was a DIY install. Easy installation in my driveway with simple tools. Easier when you remove the wheels. Nose dive and cornering lift/swing out virtually eliminated. I'm sure I could create that sensation if I really really wanted to with them installed, but I think it would be difficult. I think the steering is also more responsive. Yes I recommend the purchase/install. 821971

- SSF-106-47

After much research, I decided on these Summo Super Springs for my 2016 Mercedes Sprinter Interstate 3500 RV. They are extremely highly rated by many people and many sources. By adding these units, there will be will additional support for our new electric bikes. Although untested, as yet, due to the "no travel" COVID virus, I am sure that the additional support on the RV frame will provide a better, safer and more comfortable ride. 816240

- SSF-106-47

Could not be easier to install. Removed OEM and installed these in less than 15 minutes. Increased front wheel well clearance and leveled out the front of the motor home. I no longer feel like I am going to slide out of my seat while driving. What a difference these things make to the ride. I don't feel like a porpoise when driving over rough roads. After a couple of bumps the ride smooths out. They also reduce the side to side sway when cornering or when a large semi rolls by. Well worth the money. 809732

- SSF-106-47

I put these on the front of my 2011 Thor fourwinds majestic 19g. I'm a 52 year old woman, and it was easy for me. Just jack up the front (one side at a time) with a 12lb. bottle jack, remove the OEM bump stop with a 10mm deep socket (or whatever size they tell you in the directions) and screw the sumospring in where the old one came out. Super easy. (my husband is always impressed when I do this kinda stuff...better than paying somebody...) Drove the same day around town, and out on the highway in very high winds. Still got pushed around a bit...did I say high winds....super high winds. The sumosprings did great! Would recommend. My rig came with firestone airbags in the rear. I don't have a sway bar in the rear, and I have the original sway bar in the front. Shocks are original, and no track bars. I'm not going to make anymore improvements for a while, I think this addition will do it. 800843

- SSF-106-47

Easy install and great result in ride c omfort! 797247

- SSF-106-47

The use of this Sumo springs has greatly cut down the sway of Thor Chateau motor home with Ford E350 chassis. Very glad to have installed them. Strongly recommend them for any RV’er who has difficulty with driving any motorhome due to sway. 784362

- SSF-106-47

The sumo springs are like night and day different’s ! Love them . Best money I have ever spent ! 775716

- SSF-106-47
Mercedes-Benz Sprinter

2017 Winnebago View 24G Sprinter Chassis: The Sumo Springs have definitely improved the ride quality. The suspension has way less tendencies to bottom out when hitting bumps, pot holes and a much smoother ride on uneven pavement. Note: If you install these springs on your front suspension have the front end aligned right away. I noticed uneven tire ware after only 3 thousand miles. 770504

- SSF-106-47

Was easy to install and works very well. In conjunction with the steering stabilizer made driving our Ford Class C much more pleasant (especially when going over big bumps). 770469

- SSF-106-47

We have noticed a firmer-steady road ride from our 2018 Winnebago Navion by our purchase of the Sumo Springs. We learned of this product by watching other RV owners online video's from their installation and showcasing the results by driving it down the road. 768269

- SSF-106-47
2016 Ford E-Series Cutaway

I was able to remove the old stops and replace with these summon springs. Real easy replacement. After finishing the front end was raised by 3/4 inch. That's a good thing. I tool the Vegas for a test drive. It was a 15-20 mph windy day. I could tell there was a much firmer feel to the way it had handled. I have also upgraded front and rear sway bars and steering sway control. Safe-T-steer. 766277

- SSF-106-47
1998 Ford E-350

After reading the product information and the reviews of this product I thought they might work for my 1998 E350 2 wheel drive Club Wagon with a 7.3 Diesel. I did not feel any difference in the ride quality of my van after installing these. The van still rides very hard. I can feel every bump. 756574

- SSF-106-47

You guys are the greatest very helpful and prompt service 725557

- SSF-106-47

I had these on a previous sprinter Rv and they greatly improved the handling. I installed the front and rear Sumo Springs on my present sprinter RV and they we to with no problem. Watching the installation video was very useful. Especially the tip about spraying the rear set with silicone on removal of the old bumpers and installation of the new sumos. I haven’t had time to road test the unit after the installation but I am sure they will be an improvement. 721936

- SSF-106-47

Love the product fairly easy to install. Took just about two hours for all four Sumosprings. The front was a bit more challenging and I’ve seen somewhere else about using a plastic bag that you can cut up and inserted in the 13 mm deep socket, this will keep the nut in place while threading. Your videos are very helpful and strongly suggest that you create a how too for the front replacement 717168

- SSF-106-47

Easy one person install! Key is a 13mm deep socket. I used the provided jack of my 2015 Winnebago View to lift the front wheel of the ground (also used additional jackstands for safety). I was able to reach over the tire from the outside to remove existing bump stop and install the SumoSprings. The ride improvement (when coupled with the rear SumoSpring rear helpers) is incredible! No more extreme sway/roll when transitioning across uneven surfaces! Best is the almost total elimination of swaying when passed by tractor trailer rigs on the interstate! Highly recommend this modification especially for Class C rigs. 713776

- SSF-106-47

Felt the difference on the first right turn out of my sub witch goes down hill and tilts right. Better control stops the sway sooner thinking of putting the sumos on the rear, but worried it will make the ride to stiff on the road , I all ready have heavy road master sway bar on rear love the control and it lifts my front 3/4s of inch higher 711275

Show More Reviews

Ask the Experts about this SuperSprings Vehicle Suspension

  • Recommended Suspension Enhancement for a 2019 Mercedes-Benz Sprinter 3500
    I recommend using the SuperSprings SumoSprings for your 2019 Mercedes-Benz Sprinter 3500. These are a one-time installation that you never have to worry about checking up on and they provide more support (become more rigid) as you load more things into your Sprinter. For the front axle you need the kit # SSF-106-47 and then for the rear you need the kit # SSR-338-54. The SumoSprings are superior to the other suspension enhancement options because they tend to provide more cushion so...
    view full answer...
  • What Are the Correct SumoSprings for a 2017 Thor Axis 25.2
    According to my research, your 2017 Thor Axis 25.2 is on a Ford E-450 Chassis which means the correct set of SumoSprings for you is part # SSF-106-47 for the front and part # SSR-130-54 for the rear. These two items will do an excellent job of improving the ride quality of your motorhome by helping to cushion both side to side and up and down movement which then in turn reduces sway and porpoising. In regards to stabilizers versus levelers, they will both offer support but the stabilizers...
    view full answer...
  • How To Help Control Sway On a 2017 Thor Motorhome 22FE
    The SumoSprings Custom Helper Springs that I recommend for your 2017 Thor Motorhome 22FE is part # SSF-106-47 for the front and part # SSR-106-47-1 for the rear. The SumoSprings Custom Helper Springs will absolutely help with sway as well as porpoising. There is also another option for you to help control sway as well, the Roadmaster Rear Anti-Sway Bar part # RM-1139-117. These are the two most common upgrades on a motorhome to help with sway and other stability issues. In regards to...
    view full answer...
  • Correct SumoSprings Custom Helper Springs for a 2016 Coachmen Leprechaun
    The correct SumoSprings Custom Helper Springs for a 2016 Coachmen Leprechaun Motorhome on Ford E-450 Chassis is part # SSF-106-47 for the front and part # SSR-106-47-1 for the rear.
    view full answer...
  • SumoSprings Recommendation for 2020 Thor Axis on Ford E-450 Frame
    The SumoSprings I recommend for your 2020 Thor Axis, which is built on a Ford E-450 chassis are: - Rear Axle: SumoSprings Solo Custom Helper Springs # SSR-130-54 - Front Axle: SumoSprings Solo Custom Helper Springs # SSF-106-47 These will fit any of the floorplans for a '20 Axis, the 24.1, 25.6 and 27.7. The SumoSprings are a great addition to your rig because they reduce the amount of sway and body roll you will experience, which is all too common on any size motorhome. The SumoSprings...
    view full answer...
  • How Will SumoSprings and Anti-Sway Bar Affect Ride Quality of 2019 Thor Tiburon on MB Sprinter 3500
    You are correct that the recommended enhancements for ride quality on your 2019 Thor Tiburon RV (MB Sprinter 3500) includes the SumoSprings # SSF-106-47 (front), # SSR-338-54 (rear), and the Roadmaster Rear Anti-Sway Bar # RM-1209-131. The installation of all of these parts will give you more control while you're driving and you won't feel like you're fighting your RV down the road. These will neither increase nor decrease the weight rating of your RV. Just like any other suspension...
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  • SumoSprings and Steering Stabilizer That Fit 2019 Coachmen Leprechaun 319MB
    I would be happy to verify the correct front and rear SumoSprings for your 2019 Coachmen Leprechaun 319MB motorhome, which was built on a Ford E-450 chassis. You were right on with the steering stabilizer and front SumoSprings, but the rear application is different. In regards to removing an air bag, there is no mention of that in the instructions so as long as the air bag does not interfere with where the factory jounce bumper is, then they are compatible. - Front Axle: SumoSprings...
    view full answer...
  • SumoSprings Recommendation for 2019 Thor Vegas 27.7 Motorhome Built on Ford E-450 Chassis
    For your 2019 Thor Vegas 27.7, which was built on a Ford E-450 chassis, the SumoSprings I recommend are: - Front Axle: SumoSprings Solo Custom Helper Springs # SSF-106-47 - Rear Axle: SumoSprings Solo Custom Helper Springs # SSR-130-54 These SumoSprings will fit and do a perfect job of giving you a more comfortable and controlled ride because they reduce sway while helping keeping your motorhome level. The SumoSprings are made of a microcellular urethane which compress based on the...
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  • Recommended Front and Rear SumoSprings for 2018 Mercedez-Benz Sprinter 3500
    For your 23 foot RV that's built on the 2018 Mercedes-Benz Sprinter 3500 I recommend the 1,000 Pound SumoSprings # SSF-106-47 for the front and the 900 Pound SumoSprings # SSR-338-47 for the rear. This will give you excellent support for a level ride that will allow for much improved stability as you turn corners and travel over mistakes in the road. I have attached a couple short video demonstrations that you can check out as well.
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  • Recommended SumoSprings for 2020 Thor Axis on Ford E-450 Cutaway Chassis
    I have the perfect solution for your 2020 Thor Axis on a Ford E-450 chassis. I recommend using the SumoSprings Maxim Custom Helper Springs # SSR-106-54-1 (rear) and the SumoSprings Solo Custom Helper Springs # SSF-106-47 (front). These springs are a maintenance free, microcellular urethane springs that help cushion bumps as well as help support a heavy load to level your ride and minimize sway. Both of these springs offer progressive load control so that the heavier the load gets, the more...
    view full answer...
  • SumoSprings Recommendation for Front Axle of 2017 Thor Vegas 25.2 on E-350 Chassis
    Both the part numbers # SSF-106-47 and # SSF-106-40 are a fit for the front axle of your 2017 Ford E-350. The difference being that the part # SSF-106-47 has a 1,000 lb spring and the # SSF-106-40 has a 500 lb spring. For the weight of your Thor Vegas I'd go with the 1,000 lb # SSF-106-47 as it will be more effective.
    view full answer...
  • Installation of SumoSprings Solo Custom Helper Springs SSF-106-47 on 2017 Ford E-450
    When installing the SumoSprings Solo Custom Helper Springs # SSF-106-47 you simply need to ensure you use jack stands to support your 2017 Ford E-450's frame so the front suspension hangs freely. It is not recommended or necessary to use Loc-Tite when installing these springs. You will only need to thread the stud on the springs into the mounting location. I have attached links to both the installation instructions and a video of these springs being installed on a '17 E-Series for you...
    view full answer...
  • Recommended Sumo Springs Suspension Enhancement for 2018 Thor Vegas 27.7 Motorhome
    Given the 14.5 K GVWR of your Thor Vegas 27.7, Super Springs recommends going with the # SSR-106-47-1 Sumo Springs to provide a 4600 lb capacity. The Sumo Springs will provide a smoother ride as well as helping to reduce body roll. Keep in mind that on dual rear wheel vehicles, in order for this option to work, there will need to be at least 7 inches of available clearance between the sidewall of the inner most tire and the vehicle frame. SuperSprings didn't believe that the # SSF-106-47...
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  • Comparing the Timbren # TMBFSP35 and SumoSprings # SSF-106-47 for a 2016 MB Sprinter 2500
    Out of the Timbren # TMBFSP35 and the SumoSprings # SSF-106-47 suspension enhancement systems I recommend the SumoSprings. Although they are very similar the SumoSprings provide more of a cushion and aren't as harsh or stiff as the Timbrens. This gives you a much more comfortable ride. Both options have a 1,000 lb weight capacity but please note that they will not raise the weight capacity of your 2016 Mercedes-Benz Sprinter 2500. They are only meant to help support a suspension system...
    view full answer...
  • SumoSprings That Fit 2019 Thor Vegas 27.7 Motorhome Built on Ford E-450 Chassis
    Your 2019 Thor Vegas 27.7 motorhome was built on a Ford E-450 chassis, and we do carry the correct SumoSprings for both the front and rear of your rig. What you'll need are the following: - Rear Axle: SumoSprings Solo Custom Helper Springs # SSR-130-54 - Front Axle: SumoSprings Solo Custom Helper Springs # SSF-106-47 I've added links to the install instructions, an install video and video review for you to check out as well.
    view full answer...
  • SumoSprings Recommendation for 2017 Thor Axis on E-450 Frame
    For the weight of a 2017 Thor Axis on an E450 frame you'd want the higher rated SumoSprings part # SSR-130-54 for the rear and then # SSF-106-47 for the front axle.
    view full answer...
  • Recommended SumoSprings for Ford E350 Front and Rear Suspension Enhancement
    I'd be happy to assist. For a 2001-2014 E350 van model or 2015-2018 E350 Cutaway, I recommend the SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-130-54 which have a 2,800 lb capacity at 50% compression. These springs progressively add more support as they compress do you don't have a rigid ride and yet have the support when needed. It will help stabilize your vehicle and reduce body roll. You could alternatively use the # SSR-130-47 which have a 1,500 lb capacity. I've linked...
    view full answer...
  • Suspension Enhancement Recommendation for 2018 Mercedes-Benz Sprinter 3500 Motorhome
    For your motorhome built on a 2018 Mercedes-Benz Sprinter 3500 we have great suspension enhancement kits available but none that use air bags. Instead the kit I would recommend is the SumoSprings kit part # SSF-106-47 which is similar to the Timbren but won't be as harsh of a ride. This will help brace the rear suspension which will help the vehicle ride better and not have quite as much body roll. If you haven't driven the motorhome yet I'd recommend doing so first. There's no rule...
    view full answer...
  • Best Suspension Enhancement To Stop Bouncing on a 2015 Thor Vegas 24.1 Motorhome
    The best suspension enhancement option to reduce bouncing on a 2015 Thor Vegas 24.1 Motorhome is by far the SumoSprings Custom Helper Springs part # SSR-106-47-1 for the rear and part # SSF-106-47 for the front. The springs provide a cushion between the suspension and frame to help better absorb road shock so you don't get that bouncing feeling. The springs are one of the most popular upgrades for a motorhome so I know you will be happy with them. There will be a noticeable difference...
    view full answer...
  • Recommended Front and Rear SumoSprings for Thor Class C on 2020 Ford E-350 Chassis
    Yes, the ford E-Series chassis remains unchanged in 2020. So, as long as your 2020 Freedom Elite is a 2WD, you can use the SumoSprings Solo Custom Helper Springs # SSF-106-47 for the front axle and the SumoSprings Maxim Custom Helper Springs # SSR-106-54-1 for the rear axle. Please note that the rear kit requires 7 inch minimum clearance from sidewall of tire to frame on dual rear wheel models. Both of these are going to offer the highest capacity offered in SumoSpring for your application...
    view full answer...
  • What SumoSprings Do I Need for My 2020 Thor Class C?
    The SumoSprings are a great choice! I recommend using the SumoSprings Custom Helper Springs # SSF-106-47 (front) and # SSR-106-47-1 (rear) on your 2020 Thor Class C motorhome on a Ford F-350 cutaway. The SumoSprings are a great choice to help absorb bumps and minimize the sway that you're encountering from passing semi trucks. These jounce style springs are made from a microcellular urethane and work progressively to gain strength as more weight is applied to them- meaning the springs...
    view full answer...
  • SumoSprings Recommendation for 2018 Thor Vegas 27.7 Built on E-450 Chassis
    Yes, we do have confirmed SumoSpring fits for your 2018 Thor Vegas 27.7. For your 2018 Thor Vegas built on a Ford E-450 van chassis you can use front SumoSprings # SSF-106-40 or # SSF-106-47 if the vehicle is 2-wheel drive. There is no SumoSpring option for 4-wheel drive models but if you have a 4x4 then you can instead use Timbren springs # TUMDF70. The difference between the 2 SumoSpring options is capacity. Set # SSF-106-40 is rated at 500 pounds at 50 percent compression whereas...
    view full answer...
  • Recommended Sumo Spring Helper Springs for 2014 Winnebago Minnie Winnie 31K on the Ford E450 Chassis
    For your 2014 Winnebago Minnie Winnie 31K on the Ford E450 chassis, I'd recommend the 1000 lb capacity # SSF-106-47 for the fronts and # SSR-106-47-1 for the rear. Both these recommendations are on the heavier duty side of the spectrum, but your 31K is pretty large and you'll need a higher capacity option to absorb bumps and help reduce body roll. The springs are manufactured right here in the USA, and will remain flexible in whatever temperatures you find yourself in. The urethane construction...
    view full answer...
  • SumoSprings for a 2019 Thor Quantum KM24 Motorhome
    The correct SumoSprings for your 2019 Thor Quantum KM24 motorhome (on the Sprinter chassis) are the following: Front 500 lb - # SSF-106-40 1,000 lb - # SSF-106-47 Rear 900 lb - # SSR-338-47 1,400 lb - # SSR-338-54 I recommend going with the 1K and 1.4K kits because they will give you more support and I've never heard of someone complaining that SumoSprings have made their ride harsh so you don't have to worry about them being rated too high. I would like to mention one...
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  • Suspension Enhancement Recommendation for 2018 Forest River Forester Motorhome E-450
    Adjustable suspension enhancement would be your best option. This will give you the ability to add the exact amount of additional support you'd need to prevent bottoming out while also not making the suspension overly stiff. So for that you'd want the Firestone Ride Rite kit part # F2458 which is a confirmed fit for your 2018 Forest River class C 32 ft. on a Ford E-450 chassis. For a compressor kit to make inflating and maintaining the air bags easy we have the Firestone kit part #...
    view full answer...
  • Will the Roadmaster Active Suspension # RAS3612 Fit with Timbrens Installed on a 2001 Ford E-150 2WD
    If you are wanting to add some additional support to the Timbren System, like part # TFER15087, for your 2001 Ford E-150 2WD then the Roadmaster Active Suspension # RAS3612 is a great option. It won't get in the way of your Timbren system and it doesn't require maintenance like an air bag system would. Should you end up wanting some front suspension enhancement then I recommend the SuperSprings SumoSprings. These have the same concept as the Timbrens but we have heard from customers...
    view full answer...
  • Recommended Suspension Enhancement for 2016 Sprinter 3500
    If you don't presently tow, you can use the Timbren Rear Suspension Enhancement System # TMBRSP35A on your 2016 MB Sprinter 3500 but they may be a little stiff. They will reduce body roll, but they make the ride a little stiff for most people when they are not towing. For a similar support but a softer ride, I recommend the SumoSprings Solo Custom Helper Springs - Rear Axle # SSR-338-47 instead. In either case, I do recommend the SumoSprings Solo Custom Helper Springs - Front Axle...
    view full answer...
  • Should Front or Rear SumoSprings be Added to 2015 Thor Motor Coach First
    When improving the ride for your 2015 Thor Motor Coach 24C on a Ford E-350 chassis the best thing to do would be to install all of them. The SumoSprings replace factory bump stops and the sway bar replaces your factory sway bar. If you had to choose just one I recommend installing the rear SumoSprings # SSR-130-54 as they will help with both the sway and the jounce as opposed to just sway with the sway bar. Next I would install the front SumoSprings # SSF-106-47 as it will help with...
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  • Recommended Suspension Enhancement for 2019 Jayco Melbourne on a 2018 Sprinter 3500 Chassis
    The correct Roadmaster anti-sway bar for your 2018 Mercedes-Benz Sprinter 3500 chassis is part # RM-1209-131. This does require some drilling but it also retains (and enhances) your OEM anti-sway bar. You'd actually be pretty surprised at how much adding even just a thicker anti-sway bar can improve the handling of your motorhome. You are definitely looking in the right place when you mention the SumoSprings to help with enhancing your ride as well. I recommend adding SumoSprings # SSR-338-47...
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  • Suspension Enhancements for 2019 Thor Chateau 31Y Class C Motorhome
    Thank you for all of the info! According to Roadmaster you need the Front Anti-Sway Bar # RM-1139-176, the Rear Anti-Sway Bar # RM-1139-197 (with auto chains) OR # RM-1139-147 (without auto chains), and Steering Stabilizer # RM-RBK24-RSSC. Then for suspension enhancement I recommend the SumoSprings # SSR-106-54-1 for the rear and # SSF-106-47 for the front. The SumoSprings provide more support as more weight is added and the best part about them is that once you install them there...
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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Installed by:
Jeff D
Video Edited:
Jacob T
Video by:
Kathleen M
Written by:
Mary E
Edited by:
Sarah W
Updated by:
Jenny M
Test Fit:
David F

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