SumoSprings Solo Custom Helper Springs - Rear Axle

SumoSprings Solo Custom Helper Springs - Rear Axle

Item # SSR-329-47

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Our Price: $224.99

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SumoSprings Solo Custom Helper Springs - Rear Axle Jounce-Style Springs SSR-329-47
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  • SuperSprings
  • Jounce-Style Springs
  • Standard Duty
  • Rear Axle Suspension Enhancement
2,200-lb Capacity. Upgrade your vehicle's rear 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 - Rear Axle part number SSR-329-47 can be ordered online at etrailer.com or call 800-298-8924 for expert service.


  • All Info
  • Reviews (286)
  • Q & A (2)
  • Videos (5)
  • Photos
  • Why etrailer?

SuperSprings Vehicle Suspension - SSR-329-47

2,200-lb Capacity. Upgrade your vehicle's rear 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.


Features:

  • Helper springs upgrade your vehicle's rear suspension for improved driver control and comfort
    • Support heavy rear 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


Specs:

  • Weight capacity (at 50-percent compression): 2,200 lbs
    • SumoSprings will not increase your vehicle's weight-carrying capacity
  • 2-Year limited warranty


Rear Suspension Support

A heavy rear 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 weight of your vehicle. 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 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 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 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.



SSR-329-47 SuperSprings Sumo Springs Solo Rear Vehicle Suspension Kit

Replaces SSR-325-47



SSR-329-47 Installation InstructionsInstallation Details SSR-329-47 Installation instructions

This Product Fits The Following Vehicles

2016 - 2016 Freightliner Sprinter 2500

2016 - 2016 Mercedes-Benz Sprinter 2500

2005 - 2006 Airstream Westfalia Motorhome 18.5

2005 - 2007 Airstream Interstate Motorhome 22

2006 - 2007 Airstream Parkway Motorhome 22

2008 - 2008 Airstream Interstate Motorhome 22 Dinette Lounge

2008 - 2008 Airstream Interstate Motorhome 22 Front Sleeper

2008 - 2008 Airstream Interstate Motorhome 22 Rear Dinette

2008 - 2008 Airstream Interstate Motorhome 22 Rear Sleeper

2004 - 2009 Dodge Sprinter 2500

2003 - 2015 Freightliner Sprinter 2500

2010 - 2015 Mercedes-Benz Sprinter 2500

2014 - 2016 Roadtrek SS-Agile Motorhome Agile

2009 - 2009 Gulf Stream Vista Cruiser Motorhome G31




Video of SumoSprings Solo 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 SumoSprings Solo Custom Helper Springs Review

Speaker 1: Today, we'll be taking a look at the SumoSprings Solo Line of Custom Helper Springs for the rear axle. You'll want to use eTrailer's fit guide to determine the correct kit for your vehicle. This is what our SumoSprings look like when installed. Yours may look a little different depending on your vehicle.They're gonna replace our factory jounce stops and sit right between our frame and our rear axle. So whenever we're carrying a heavy load, they're gonna give us that extra support that we need. The way our SumoSprings are gonna work is when our suspension starts to sag from the heavy load, these are gonna absorb a lot of that weight.They are gonna work independently from each other so it's gonna help with those off-center loads.

Our springs are gonna have a progressive rate to 'em. So if we have a light load, they're gonna compress softly, still giving us that comfortable ride. But the heavier load we put on 'em, the more they're gonna compress and the more firmness they're gonna have to them.Now comparing to our factory jounce stop, you can see there's a big difference in height. These are gonna give us a lot more compression, whereas our factory jounce stops are really just preventing the axle from hitting the frame.We have a water tank at the bed of our truck as a heavy load or to simulate the tongue weight of a heavy trailer or a fifth wheel. So as I take the truck through my test course, I can definitely tell that there's a load back there.

The engine doesn't seem to be strained that much, but the bumps are extremely harsh and I can definitely feel it resonating through the seat.When I come to the slalom course and I'm going through the turns, it definitely has a lot of body roll and I just generally feel like I need to slow down because it feels likes it's leaning a lot and it's not responding quickly enough to the turns.Now that we have our SumoSprings installed and I have the same load back there, when I'm driving through our course, I can immediately tell a difference. It's much of a smoother ride. Going over the bumps really doesn't feel like anything's back there and it's just a lot more comfortable.When I come into the slalom course, it definitely feels a lot more stable and it doesn't seem to sway as much side to side and it just generally feels like it wants to go faster.These are made of a durable micro cellular urethane that works in temperatures from -25 degrees to 200 degrees Fahrenheit, and resists damage caused by oils, road salts and UV rays. Compared to air bags, these are maintenance free option with no tubes to run or air pressure to maintain. Both will help level your load and provide a smoother ride.

Airbags can be adjusted to suit your needs whereas the SumoSprings are a fixed option.That completes our look at the SumoSprings Solo Line of Custom Helper Springs for the rear axle.


Customer Reviews

SumoSprings Solo Custom Helper Springs - Rear Axle - SSR-329-47

Average Customer Rating:  4.7 out of 5 stars   (286 Customer Reviews)

2,200-lb Capacity. Upgrade your vehicle's rear 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.

- SSR-329-47
by:
Mercedes-Benz Sprinter

Rebecca knows her stuff. I gave a request on a Mercedes Sprinter van for our son AND on my Mercedes Winnebago camper and she got both of them correct. The order arrived almost overnight. I trust her. 539469



- SSR-329-47
by:

What a great alternative to having to worry about the air bags all of the time!! 614637



- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Great product, keeps the truck level even with a heavy load! 661134



- SSR-207-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


My order arrived 4 days early, WOW. I did use 2 flat blade screw drivers to remove the old bumpers. When I installed the new Sumo Springs I put a little liquid soap on the top edges, this helped pop them in. I also used a piece of 2X4 to help push them in, and quickly released the floor jack and this seated them in fully. Quick install took about 20 min. I have less than 1" at the bottom. Unloaded ride is same as before. With my trailer attached (1200 LBS hitch weight) the short test drive I felt much better control and less bounce. Very happy with product and etrailer. THANK YOU! 517005


Comments

Still working great, very happy with this product.

Robert V - 06/05/2019

56202

- SSF-106-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


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-402-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


I put these on my 2017 2 door jeep wranger. I have factory springs no lift. I put on aftermarket front bumper with wench, rear bumper, roof rack. With all the other gear in the jeep, frig, and all camping gear, and plans on putting on a rooftop tent. The ride was a harsh because off all the extra weight, so i thought i would give it a try. I first got air bags for the rear and they worked great, improving the ride, but now the front was still harsh. So i thought i would try the sumosprings. All i can say about the sumosprings is that there awesome. I can now go over bumps on dirt roads, paved roads, train tracks, and it dosnt beat the crap out of me. Jeep feels like its happy. 518093


Comments

Still no problems, works great even after a year.

Dan - 06/06/2019

56248

- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Very easy to install. Normal ride unless loaded and ride is smooth, even then. Helps with porpoising when hauling a heavy tongue weight. 658065



- SSF-106-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


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


Comments

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

57463

- SSF-106-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


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



- SSR-610-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


I've had these for 1 year now for my 2016 Tundra and they are exactly what I needed!!! I couldn't be happier! Prior to purchasing and installing these, when I towed my 2 horses with my 2 horse slant bumper pull trailer, I was concerned about cargo weight in the bed of my truck so I was limited to gear I could bring camping and hunting season with my truck. Since adding these I can pull the horses and load my truck bed to the max including horse feed, hunting gear, coolers with food you name it and my truck doesn't even squat a bit! The ride is great with a load or without and my performance off road is still fine too! These proved to be a great solution to my needs and frankly better than pricey air bags. 673850


Comments

Were glad to hear that youre pleased with your purchase. Please keep in mind that the Sumo Springs product will not increase the capacity of your rear truck axle. The tongue weight of the trailer plus the weight of the cargo carried should not exceed the trucks rear axle capacity.

-- Mike L - 07/24/2019

58178

- SSR-330-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


These were installed on a 2017 Sprinter 2500. They get 5 stars for ride improvement but the 4 stars is for the installation instructions. I could not install them following the directions. An installation video from Sumo Springs would be most helpful. In the end, I used the instructions for another similar product and they went right in. My wife and I feel it is a 5 star improvement in the ride. The Sprinter feels more solid on the road, and going over bumps, especially at an angle, they really cut down on the body swaying. Product is highly recommended. 524172


Comments

The Sumo Springs do make a big difference in the body roll and stability of the Sprinter, which is an RV rolling at around 8,000 lbs +. Just added Sumo Springs to the front and that has improved the handling even more.

Zane - 06/19/2019

56842

- SSR-130-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


It fits the 2017 C-class E350 Thor Chateau without the need for the 1" spacer. This product has better fit than its heavy duty counterpart. 636433



- SSR-610-40
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Product was delivered and was a breeze to install! A friend happened to be around when I got started and we had them both installed in less than 20 minutes with the help of a car lift available to us. Didn't quite raise the bed of the truck as far as I hoped it would, but still a great product! Guess that's just the Baja Edition? But did find out I might need different shocks so that will be my next step soon. 508762


Comments

Still working great and as expected!

Randy B - 05/14/2019

55238

- SSR-610-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


2009 Tacoma Offroad TRD DCSB Needed to correct squatting under load, and when towing small travel trailer. Install was easy and straight forward. Stock U-bolt nuts use 19 mm deep well sockets for removal and replacement. Sumo spring required jacking up the frame a couple of inches to allow install above leaf springs. Torque nuts to 90 ft-lbs. Need to re-torque after 500 miles. Highly recommend. 680497



- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


The installation was relatively easy and straight forward. I’ve not yet attempted to hook up to my 5th wheel to see if it’s going to reduce the sag I was seeing that moved me to try this product. So this review is really about the install. 620456



- SSR-610-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


They work great and simple hand tool install at home. 301052



- SSR-610-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Put these in my 2007 Tundra. I could tell a great difference just rounding corners with stability with out a trailer on. I like my trucks to ride like trucks and this for sure helped with that. Also when I hooked up my enclosed car trailer loaded there was a huge difference in the amount of squat it had versus before I put them on. 597026



- SSR-114-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Installed when factory bushings deteriorated. I had noticed a slight sway when towing 9000 lb travel trailer during cross winds. Once installed, sway was gone. I will either take these off when I replace truck or purchase new ones. 582583



- SSF-106-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


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-106-40
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Excellent service! 506532



- SSR-186-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


2011, F53, 22,000 lbs chassis. After having adjusted tire pressure, installing new shocks and a rear trac bar, these are the icing on the cake. I installed the front Sumo’s and was so impressed I immediately purchased the rears. The side-to-side sway is almost completely gone, my motorhome tracks so much better now, and it actually soaks up a lot more of the little bumps. I’m really happy with the Sumo Springs and Etrailer. 225878



- SSR-114-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Simple installation completed by 75 yr old in less then one hour.... Over the normal street bumps you get no KerThunk!!!! Smoother ride noticed immediately. Will follow up additional when we hook up the fifth wheel........ 483607



- SSR-290-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Great service arrived in 3 days. Installed the Sumo springs last weekend. It was about a 15 minute job on a P32 chassis. I used the supplied spacers and it raised the rear end about 1/2 inch and really reduced the body roll. They replaced the stock rear jounce bumpers which were shot. This is what should have come on the motorhome from the factory. 151532



- SSR-610-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


100% stock 2017 Tundra SR 4WD V8. Bought these to provide a bit more stability when towing 27' 8600 GVW tag along camper usually running around 8000lb actual weight. Weight distributing hitch w/ sway control. Wasn't horrible before but wanted suspension stiffened up some. Easy to install if you have a torque wrench and the most basic of hand tools. Did exactly what I wanted it to do. 467194


Comments

Still working great.

Dan - 01/14/2019

48520

- SSF-106-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


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



- SSR-610-40
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Great product ! Does all it claims and more than i expected. I leave my 5th wheel hitch mounted yr. round and haul bins of sand when I plow in the winter, so it's helping all the time. I can see and feel a difference in hauling our 30 ftr. Doesn't change the ride at all like just about anything else you'd need to do to get the help these give you. Easy install too! 347625


Comments

Still goin strong. I’ve had numerous campers even a Tundra owner inquire about what I’ve done to level my truck for the load. It totally out does more springs! When and if they fatigue, I’ll buy em again.

Randy M - 03/12/2018

35747

- SSR-338-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


bumpers act as designed, coupled with front and back sway bars they make up a good correction to the rock and roll of the Mercedes 3500 309546



- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Easy to install. Helps with towing when carrying a load in the truck. Have had other systems in previous trucks but this one is my favorite. 472776



- SSR-130-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Front & Rear Sumo Springs Just installed the Sumo Springs I ordered and oh WOW!!!!! That is the finishing touches to my suspension on my 32 ft Class C on an E450 chassis and love the results. Bought our coach a year ago and installed Hellwig sway bars ( front & Rear ) Bilstien shocks and Safe T Plus Steering control and that made a huge difference to drivability but then decided to add Sumo Springs, Oh My Goodness with all that I’ve done our coach drive down the highways and byways rock solid. The sumos weren’t to difficult to install considering this ole man has had 3 back surgeries and 2 bad knees but we got it done and I was blown away on the test drive. I highly recommend the Sumo products. 641292



- SSR-114-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Great product, definitely gets my truck leveled out with our 5th wheel trailer! Easy to install, would highly recommend Sumo Springs. 132624


Comments

I would highly recommend etrailer, there customer service unsurpassed, great products, great company!

Mark S - 05/27/2015

12070

- SSR-610-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Got the SumoSprings 3 days after placing the order. Installed them on my 2009 Toyota Tundra in about 45 minutes, saved about 2.5" to 2.75" of sag with my trailer hooked up. Had 3/4" space between frame and spring when operating without trailer. 323053


Comments

I am sorry but I no longer own the Tundra, but I did purchase a Timbren Suspension Enhancement System from Etrailer just over a year for my Tundra replacement.

Patrick D - 12/07/2017

31527

- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Shipped fast. Easy to install. Work seamlessly. I put these on a 2018 F150 HDPP. I wanted to retain the factory ride quality when empty and have more support when loaded near my GVWR. With the 1" spacer, they nearly touched the axle (1/8" space) and make the ride very firm. So I removed the 1" spacer and the ride quality was indistinguishable from stock on all but the largest bumps. These Sumosprings engage so smoothly that you can't feel the initial contact, it feels like the springs just get progressively stiffer at a rate that is faster than the stock springs alone. Note, I slightly rerouted a cable because I thought it might contact the Sumospring and wanted more clearance for piece of mind. I don't know if this is necessary on the f150 or not, but it I know others that have done this as well. This adds a little time to the install. But still under an hour including finding misplaced tools. 520312



- SSR-114-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Installed these on my 2012 Ford F-350 King Ranch 6.7 Improved the ride, even when empty. Reduced the harshness, the sharp jarring felt when hitting even small bumps, and pot holes ! Haven't tried it with my Montana Mountaineer 5th wheel camper yet, looking forward to that. 323354



- SSR-307-40
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


The tech support was superior ! 398854


Comments

Working Great

John M - 06/25/2018

40169

- SSR-338-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


I have a 2014 Winnebago View on a Mercedes 3500 chassis. Installed these replacement bump stops along with a Hellwig sway bar. First, they really are as easy to install as the instructions suggest. The most difficult part was figuring out how to get the floor jack high enough. Second, after these two minor upgrades that took about 2 hours to install, I can not believe how well the coach handles now. Unbelievable improvement for little $$$ and easy installation. I would recommend to anyone. etrailer has always been super easy to work with on top of the products, I initially ordered the wrong bump stops (2500), easily exchanged for the proper items. 178404



- SSR-610-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Product was easy to install.Three months later I retighten them, they were just as tight as when I installed them. My camper rides and trails better.No dip in the middle.My trucked is rated for my camper but sometimes I have more weight in the back of the truck than I was expecting no trouble any more. 595639



- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


The product was easy to install. The Tools needed list needs to be updated. Removing bolt is 13mm. Installing new bolts are 15mm. Also the nuts that are tack welded inside the frame will break loose if any rust or debris are on the threads. Back up wrench is near impossible if to fit if the size is not known. End up cutting the old bolt because of this. That’s not your products fault. That’s Fords issue. With the 1” spacers provided it raise my F150 4 1/2”. Stiffened the ride up. Ready to haul my 5th wheel. NICE 452641


Comments

The Sumo Springs are still performing well. I Hauled our 29.5 5th Wheel from Upstate NY TO Florida through a major 4 State nor’easter. We have also bought a 16’ cargo trailer and hauled it to it’s full weight capacitie. The truck is still sitting high.

Rodney - 11/16/2018

45792

- SSF-106-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


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



- SSR-127-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Product came in just fine and right on time. Installation was as simple as could be. Couldn't accurately give a review on their performance as this was for a customer's vehicle and we aren't using them. All the ones that we have used have worked remarkably well, however. 397591



- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Install was super easy and the product does what it claims to do. Hauling the horse trailer with these added on is much more stable (no pun intended) and the sway is almost eliminated. 545406



- SSR-302-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


I purchased the Sumo springs (rear) for my 2008 Dodge 2500 after they were highly recommended by the RV dealership where I purchased my Palamino truck camper. Not only did they ride really well on my 200 mile trip from Waco Tx to San Antonio but there is no rear end sag . My truck has a leveling kit in the front. I am a believer in these Sumo springs and would recommend them highly. 517946



- SSR-338-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Installed the black sumo only 2 wekks ago.Should have done that right after reception last year. Reduce sway totally when i leave my yard(3 inches bump). Don,t need stabilizator,floor is very solid and stable. On the road test for only 10 miles, there is a much better stability. I already have yellow sumo on front suspension where suspension was weak and direction instable.those problems have disapeared. Very satisfied client. 07 view sprinter 2006 579304


Comments

We are glad to hear that the new SumoSprings you purchased are working well for you. Please keep in mind that suspension enhancement products like these are intended for use on suspension systems that are in good working order.

-- Mike L - 11/02/2018

45313

- SSR-290-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Arrived as promised,extremely well built product,well give a full reveiw when I use the motorhome again. 97153


Comments

This is a must have product,was an easy install and has performed flawlessly for the past year.With the quality of this product cannot imagine ever needing to replace them. John H.

John H - 08/29/2014

6546

- SSR-117-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Fit just as advertised. Shipping was fa st. 467949



- SSR-116-40
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


The sumo springs installed easily and greatly improved how my travel trailer towed. 571180



- SSR-121-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Easy install, great performance, no maintenance. What could be better. 575229



- SSR-338-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


08 Winnebago View on an 07 Sprinter chassis. To reduce the side-to-side rocking that is inherent in this tall, narrow, heavy vehicle, I decided to try the Sumo SSR-335-47's on the rear bumpstops. Using the vehicle bottle jack, I raised the rear tires almost off the ground, one side at at time, to provide enough room to fit the Sumos into place. The old bumpstops simply pop out with force from a couple of screwdrivers, and the Sumos simply slide into the existing brackets. The fit is precise and snug. I put soapy water on the brackets and applied a bit of force to wedge the Sumos into place. It's that simple. The difference is pronounced, with significantly less rocking over minor road undulations. I'm impressed with this product, and wish I'd done this simple modification long ago. 156528



- SSR-338-47
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Not hard to install, great customer service, received very quick. Thanks a lot will be ordering from you again. 544367



- SSR-114-54
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


I installed these (front and back sets) a year ago and they still work very well. I pull a fifth wheel and these help keep the truck level and the ride comfortable. They were one of the best things I have added to my Super Duty. 352792


Comments

They work fine. Makes the ride a little rougher, but the truck likes having them.

Ben C - 03/15/2018

35932

- SSR-610-40
by:

Review from a similar SuperSprings SumoSprings Solo in Vehicle Suspension


Re levels the poor Tacoma leaf springs. But definitely stiffens the ride on the off-road Bilstein shocks. If you carry a reasonable amount of weighted recovery gear at all times like I do, these are worth adding to your suspension. I installed them in 20 minutes. 561552


54
308
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  • SuperSprings Rear Helper Springs on 2016 Mercedes Sprinter 2500 are Not Engaging
  • Having that slight gap between the new SuperSprings # SSR-329-47 and the platform they make contact with is common not just with this brand but with others as well. It allows your suspension to compress some so as not to have too much of an effect on the unloaded ride quality. Since the springs are not engaging at the rear of your 2016 Mercedes Sprinter 2500 that means that the factory suspension is not compressed enough. And that means that the amount of weight you have in the van...
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  • Correct SumoSprings for a 2006 Roadtrek SS Agile on a Dodge Sprinter 2500 Chassis
  • The correct SumoSprings Solo Custom Helper Springs for your 2006 Roadtrek SS Agile on a Dodge Sprinter 2500 Chassis is part # SSR-329-47 for the rear and part # SSF-401-54 for the front. These are both easy to install and will work well to provide additional support and help reduce body roll. They are a very popular upgrades for these Class B motorhome conversions.
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Info for this part was:

Edited by:
Leah B
Video by:
Andrew K
Expert Research:
Michael H
Video Edited:
Jacob T
Video by:
Dustin K
Installed by:
Cole B
Video Edited:
Chris R
Written by:
Mary E
Photos by:
Stacy F
Installed by:
Robert C
Test Fit:
David F

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