Suspension Upgrade Improves Our Gas RV Ride

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After 2 years of full-timing, driving over 20,000 miles across 40+ states, we decided to upgrade our RV suspension. Marc began considering this in the fall of 2015. He explored the many options available. Finally, after reading an article in Motorhome Magazine about an ‘airless airbags’ solution called Sumo Springs, he got even more excited about improving the way our gas coach rides and handles.

If you’re more of a reader, then you’ll get the general gist by reading this article. But if you want more detail or simply prefer video content, then jump right over to watch the video. Marc shares his thoughts and research on the various suspension upgrade options. It also explains why we chose SumoSprings and our experience driving our coach both BEFORE and AFTER the install. If you want to upgrade the ride and handling of your RV or truck. Or if you are grappling with the decision of whether to buy a Gas or Diesel coach, then this video (and article) are definitely for you..We help answer your burning with questions. What is involved? What do they cost? Do they really work? Are they worth it? 

We hope that by sharing our experience it will help provide some insight and answers to others on the journey. Please forgive the road hum, as we filmed this video while driving across I-70 WB in Kansas.

Why Upgrade the Suspension?

As you might have seen in our blog post and video Our Experience Driving a Gas RV gas coaches are known for not handling nearly as well as diesel coaches which run on air suspension. It’s one of the many reasons for the big ($50k-$100K) price difference of Gas vs Diesel coaches. Which is probably the most asked question when it comes to considering which RV to buy? We certainly appreciate the performance, handling and braking capabilities of diesel coaches. But for us – still young-ish, working and saving for retirement – it was paramount for us not to overcommit financially when buying our RV. We are well aware it’s a depreciating asset. But it’s also important that our home on wheels is reliable and comfortable.

While we remain extremely happy with our gas coach, there have been a number of times that we both (Marc especially, being the primary driver) wished the handling was more solid and stable with less swaying, especially when entering and exiting driveways, off-camber surfaces, rough roads and in windy conditions. Though Marc has never experienced ‘white knuckle driving’ we know plenty of fellow RVers who have. So we figured if we could find a way to improve the suspension without breaking the bank, then it would be money well spent.

It’s a subject of interest for many gas coach owners and future owners. Suspension upgrades make a lot of sense for high profile and heavy load vehicles.  RVs and trucks that tow 5th wheels and trailers definitely qualify. Suspension upgrades are designed to enhance load carrying ability, stabilize sway and improve overall driver control and comfort.

What are the Options?

There are many different solutions to choose from when upgrading your RV/truck suspension. Sway bars, track bars, steering stabilizers, shock absorbers and torsion bars are a few of the most popular. You could literally go down the rabbit hole of suspension research for hours, days or weeks on end, investigating the pros and cons of each. But we kept our research focused on finding affordable solutions that came highly reviewed by other gas RV owners with coaches built on the same Ford F53 chassis that we have.

After scouring RV and Tiffin owner forums and speaking to other RVers during our travels, we found that everyone has their own opinions on what is ‘the best’ solution. Regardless, it seemed that no matter which way we went, we would end up with a better outcome than what we currently have.

In the end, for us, it was about finding the balance between a significant improvement to our driving experience and an affordable upgrade investment.

We’re realistic enough to know that our gas coach with leaf spring suspension can never compare with the way an air suspension diesel coach drives. But as we shared in Our Experience Driving a Gas RV video we tend to drive shorter distances, stay for longer periods and we’re rarely in a hurry. Hence why it’s taken us 2 years to get to this point. Upgrading our suspension wasn’t essential. But after 15 or so months on the road, we came to feel it would definitely make for more enjoyable driving and worth spending money on for our future travels.


What Suspension Upgrade Did We Go With?

After looking at the many options available, Marc decided that SumoSprings were the way to go for us and our coach Rocky, for several reasons:

  • Ease of installation
  • Affordability (about $1,000 less than some other solutions we considered)
  • Zero maintenance after install (set and forget)
  • Overwhelmingly positive feedback on results – from other RVers, Motorhome Magazine and Tiffin
  • Confidence knowing that SumoSprings are now a factory installed option available on new Tiffin coaches

What are Sumo Springs?

Known as an ‘airless airbag’ Sumo Springs are a closed-cell microcellular polyurethane supplemental spring that results in a smoother and quieter ride for the Ford F53 chassis, which our gas Class A motorhome is built upon. We got the ‘Maxim’ which is one piece that attaches in two places – the chassis and the axle. The front set are blue and the rear set is yellow, replacing the substantially smaller factory bump stop.

According to the manufacturer’s website, SumoSprings:

  • will compress up to 80% of their original height and stretch up to 50% of original height with full memory rebound
  • have progressive load control
  • are leak-free and highly resistant to oils, salts and UV rays
  • will perform within temps of -25°F and 200°F and are 100% maintenance free ‘fit and forget’.

The latter was especially appealing. We didn’t want to have to bother with constantly adjusting air levels for air bags as temps and elevations changed, or have to worry about them developing cracks or leaks.

Can You Install Sumo Springs Yourself?

Yes, if you are mechanically minded and have the tools, space and time to do it, you can install SumoSprings yourself. This could save yourself a few hundred bucks on labor and get the satisfaction that comes with doing a DIY job well. While Marc is mechanically handy and did consider this option initially, being full-time RVers we’re definitely short on time, space and tools. So it made the most sense for us to opt for a professional install. Just be sure to order the correct parts for your specific vehicle. You can check the manufacturer’s website or contact them by email or phone for support. Follow their instructions for installation. You should be able to find a step-by-step instruction PDF and video that shows you how to do it.


The Installation Process

Initially we planned to have the SumoSprings installed at the Tiffin Service Center in Red Bay during our visit in May. But they don’t do after market installs. So they recommended a local shop to do the work. Belmont Diesel is only 7.5 miles and a 15 minute drive from Red Bay. They were able to get us in quickly, the day after our Service and Paint/Body work was completed at Tiffin.

The shop owner, Rodney, advised the install typically takes 6 hours. But he put two guys on the job and we drove out of there in under 3 hours. Fortunately, we were able to work from the coach while they did the install. This was very convenient for Marc who spent almost the entire time on conference calls while I (Julie) watched the install process. It was fun learning about the process while capturing footage for this blog post and the video.

The guys worked very fast and knew what they were doing.  They do plenty of these installs, which instilled us with a lot of confidence. Just watching them, we knew we had absolutely made the right decision in having them professionally installed. It would have taken Marc at least an entire day or weekend. And, we would have had to buy specific tools and frankly, we’d rather spend our time exploring!


What Was the Cost?

We had Belmont Diesel order the parts and bill us for parts and labor. Total cost of $1,450 including tax.

Considering the parts are the majority of the cost, we felt this was very reasonable. The labor rates at Belmont Diesel are (at the time of writing) $65 an hour. Tiffin rate is $95 per hour (again, at time or writing). The cost may vary depending on the shop you choose. We would recommend going to a place that has done them before to expedite the install and keep your labor costs down.

Depending on where you buy them from, the parts alone can add up to anywhere from $1,000-$1,200 ($500-600 a pair – front and rear). We noticed Tiffin had at set of SumoSprings for sale in their Parts and Supplies Store for $1,300-$1,400. When we looked online, we saw them on for between $500-600 a pair.

The cheapest place we have found to buy the parts is Amazon ($470-$500 a pair). Just be sure to order the correct model number parts for your specific vehicle. We suggest checking with the manufacturer Super Springs first to confirm what you’ll need before ordering. You could probably order the parts yourself and then simply pay for a shop’s labor time to install them, or do it yourself.



Product Details

Our motorhome is a 2012 Tiffin 35QBA on a 22,000lb Ford F53 chassis (built in 2011) and the Part Model Numbers we installed are:
Front SuperSprings SSF-180-40-1 SumoSprings Maxim Front Airless Airbag Kit – click to view/buy on Amazon
Rear SuperSprings SSR-180-54-1 SumoSprings Maxim Rear Airless Airbag Kit – click to view/buy on Amazon

Naturally, if you have the same chassis as ours, these part numbers will work for you. But for anything different, we recommend you contact the manufacturer to find out the specific parts model numbers to suit your RV/vehicle. Oh and by the way, don’t be deterred by the 1 star Amazon review for the front SumoSpring. When you read it you’ll understand why.


The Results?

And the moment you’ve all been waiting for. Do they really work? Are we happy with them? Do they make a difference? Are they worth the investment? Do we recommend them?

The short answer is absolutely 100% YES on all counts! We noticed the difference in reduced sway even before we even left the shop’s gravel, pot-holed parking lot! Since then, we’ve driven over 1,000 miles across 5 states in the past two weeks and we are extremely happy with how much better the coach drives. It feels more planted and stable on the road. There is noticeably less sway. Marc feels less fatigued after long drives and in general he feels more in control of the vehicle and is less impacted by winds. In Marc’s immortal words, he has less “pucker factor” now!

If you’re interested in the longer answer with more detail or you are shopping around for a suspension upgrade, you will find the video extra helpful. Marc talks comprehensively about our entire experience – research, reasoning, installation and ‘before and after’ driving experience. The video is just under 17 minutes but it is thorough and will speak directly to many of the concerns, questions and hopes of fellow gas RV drivers (or trucks towing 5th wheels or travel trailers). It will be well worth your time (at least, we think so). As always, Marc aims to take a balanced approach in sharing his feedback, considering the many different options available and different needs of RVers.

This suspension upgrade is the single largest expense we have made on an RV repair/upgrade in the two years we’ve owned it. We are already thrilled with the difference it’s made. it was unquestionably money very well spent.

We’ve included links to related articles, videos, the manufacturer and the shop who did the install below.

Related Videos and Articles

Driving a Gas RV Our Experience, Advice & Tips
A Slice of RV Life Episode #26: Windy Day
Our RV Repair Punch List (for the Tiffin Service Center, Red Bay, Alabama)
Our ‘Visit to Tiffin’ Series
Motorhome Magazine February 2016 Issue (article on suspension upgrade with SumoSprings)
SumoSprings Overview by Manufacturer, Super Springs
Belmont Diesel Service (Belmont, MS) – our contact is the owner Rodney. If you end up going there, please tell him we said hi and we still love them!

We hope you’ve found this article and video helpful. Please feel free to share with anyone else you feel may find it useful.

What’s Your Suspension Upgrade Experience?

Have you done a suspension upgrade to your RV or truck? What did you install and what has been your experience? Please feel free to share your comments, questions and feedback in the Comments Section below for the benefit of others doing research on this subject.


We want to make it very clear that we are in NO WAY affiliated with Tiffin, Super Springs (SumoSprings) or Belmont Diesel, MS and we were not paid or compensated by anyone for this article/video. The content was produced purely to share our honest opinion on our experience – before and after – of our suspension upgrade. We create all of our content to help others. This article/video were produced specifically in response to the huge amount of interest we have had from other RV owners who learned we were considering installing Sumo Springs in our Tiffin Service Repair Punch List Video.

As mentioned, there are other suspension solutions out there. We are not experts in suspension. So we cannot comment other than what Marc shared in the video. If you’ve found this info helpful, the links to products are Amazon links and we receive a small commission if an order for any product is placed within 24 hours. This is at no additional cost to you. Thank you for sharing the journey with us! Happy Travels!

39 thoughts on “Suspension Upgrade Improves Our Gas RV Ride”

  1. Just did my last upgrade to my suspension on my 2016, Tiffin Open Road 34 PA. I just installed a Super Steer Track Bar #525. My previous upgrades are, SS steering stabilizer, front/rear sumo spring, and 4 Bilstein shocks. I am extremely happy with the results. Tracks perfectly, has much less body roll, and very little wind turbulence from passing trucks. I pull a fiat 500L and I don’t even notice it back there. I believe the 252 inch wheel base and proper balanced loading, also plays an important roll in ride quality.

  2. have a 2012 Winnebago vista 26ft, did some major changes on the suspension front end
    roadmaster steering stabilizer rear swaybar also sumo springs front an back. An I installed this my self. The reason why is that when I overtook a semi truck It was scary over taking the rig feeling that I or the semi would take out my side mirror as I was white knuckling it all the way. Had a class A license all my life drove lots of trucks but never experienced an thing like this an even to this day its scary don’t know what to do asked a lot of questions to no avail also new front tires instead of weights on the rim they put beads in both front tires did make a difference but I thought it would be better, its like the front tires follow every grove in the road an the roads in Calif suck . Can’t take ur hands of the steering wheel love the coach but the steering sucks an also there’s not that much play in the steering wheel while your driving it just wants to take you where u don’t want to go anyone that can help me let me know please let me know

    • Hi LLoyd, Sorry to hear that you are still having such a unsettling time driving your coach even after all the suspension upgrades. I am pretty sure you will never get a gas powered class A motorhome to feel as planted as the big semi-trucks you have experience with. I have driven big tag axle diesel coaches. It is possible that your coach might have something else wrong. You might consider going for a test drive in another coach to compare, but pretty sure it is just the unsettling nature of the way gas class A coaches drive. Even after our suspension upgrades, though much improved, it still would sway and lean, but I had gotten used to the ‘floaty’ driving style. I of course prefer the much more planted and controlled feel of a car (especially my sports cars of the past). But that is part of why we drive our coaches so much slower, and also why it is so much more mentally fatiguing than it is to drive a car. If you can afford one, consider test driving a large diesel pusher motorhome(even if much older), especially a tag axle to see if that gives you a more settled experience. That.. or consider changing to a smaller rig like a truck and trailer. But with way more truck than needed for the trailer you choose. With your semi-truck experience, having a truck and trailer might be more comfortable. Sincerely hoping you find a solution. -M

    • We have a 2016 Fleetwood Storm 28MS. We have already installed a Saf-T-Plus front stabilizer bar, rear trac bar, and put softer Koni shocks on it. This corrected the, wander, sway, and push from eighteen wheelers.
      My problem is the jarring. The front suspension is so stiff the vibration from ripples in the road shake the RV so bad it breaks the dashboard mounts. Will the Sumo springs help soften the ride?

      • Hello Doug,
        Sorry to see you still have such a rough ride, but glad to hear that your other upgrades have at least improved some aspects of ride quality. Gas motorhomes definitely are not known for great ride. Unfortunately, no, the Sumo springs will likely not soften the ride for you.

      • “We have already installed a Saf-T-Plus front stabilizer bar, rear trac bar, and put softer Koni shocks on it. This corrected the, wander, sway, and push from eighteen wheelers.” Which of those 3 upgrades made the biggest difference?

    • Why are all of us dummies paying for suspension upgrades which should’ve been provided by Ford included in the F 53 chassis and by individual manufactures that build out coach is too heavy for the or too high of center of gravity for the standard F 53 suspension a class action suit allotting All owners of these class a motorhomes with dangerous handling characteristics should join together $3,000-$4000 Budget to satisfy the minimum handling characteristics these vehicles should have… case in point or Fleetwood flair 26E is dangerous to drive!

      • Yes would be nice if Ford paid for it, we have now sold that RV. Paid for the upgrade which made an improvement… waiting for a class action lawsuit would take forever and we just did what we felt would improve our experience in a timely manner… Haven’t driven the Flair, but sometimes you get what you pay for!

  3. I recently purchased a 2016 Tiffin 34 PA. The previous owner had sumo springs and bilstein shocks installed. I just added a safe t plus stabilizer. We just did a 1000 mile trip in it and I experienced no fatigue at all. My coach is a joy to drive! I believe the previous owner may have installed a 5 star tune as well. I say this because of the shift characteristics when climbing hills.


    • Hi Chris, thanks so much for sharing your experience as we had only installed the Sumo Springs (made a nice difference) but we had not installed the bilsteins, safe t plus stabilizer or 5 star tune (which we have heard GREAT reports on). So hearing you experienced no fatigue after a 1,000 mile drive and your coach is a joy to drive is very useful for others reading this, and we can reference your experience when asked by others. Thanks so much for taking the time to share. Sounds like you have a great coach there that you will get many years of driving enjoyment out of! The 34PA is a great floorplan, and buying used, you would have scored a good deal compared to buying new – and of course it already had the sumo/bilstein upgrades and no doubt the ‘bugs’ had already been worked out. This is an excellent example of buying used well, and making it your own to satisfy your driving and comfort needs. Thanks again! And Happy Trails!

      • I just watched your windy day video I wanted to let you know that the long trip we just finished started out on a very windy day here in South Jersey.
        I just got the safe t plus on a couple days before we left.
        As we headed down the highway I could see the treetops swaying a lot. I expected the usual, but when the wind hit the coach it tracked perfectly straight with just the slightest tug on the wheel. I expected to be thrown down wind but it didn’t happen.
        The safe t plus is a major improvement in handling and I’m glad I got it.
        I hope I never experience a blowout, but I’m pretty sure the safe t plus would aid in recovering control of the vehicle.

        • Thank you so much for sharing your experience! That is great to know. We have heard a lot of great reports about the Safe T Plus steering stabilizer. We have a diesel now and don’t feel we need it but great to know that you noticed a substantial improvement! This is such greta info for others reading the post comments too and we can refer to your experience when asked – so thanks again!

  4. What is 5 star tuning? I am looking into getting the sumo springs. Do you have a steering stabilizer? If so, what do you think of it?

    • Hi there, we didn’t get a 5 star tune or steering stabilizer on our gas motorhome but have heard good reports about both. We only installed the Sumo springs and were happy with that upgrade. You can learn more about the 5 star tune here and google for some other blog posts about it by other RVers who have had it done. Since this post we have sold the gasser and switched RV to a diesel pusher in March 2018.

    • Don’t do it! Just bought a 2016 Tiffin Open Road that has the Sumo suspension installed by the previous owner. The ride is terrible. Every little bump in the road is amplified. If you hit a big pothole the whole inside of the coach will rattle until you think it’s coming apart. It will not stop the “old” you get when you hit a bump like when you go from a roadway to a bridge. This whole thing is a real disappointment and I may look into having them removed.

      • Have you actually driven a similar gas coach WITHOUT the Sumo Springs? Yours is the first report we have heard from anyone feeling they did not improve the ride. If you are looking into having them removed, we would be interested to hear how you felt that “improved” things.

  5. I’m concerned about the damage my gas coach is incurring from the rough highways of the Midwest. Will these help prevent damage from rattling apart?

  6. Marc, I just took delivery of a 2017 Tiffin Open Road with the Sumo Springs installed at the factory. Love the reduction in body roll and lean. Really good ride on smooth road. Much to my surprise when I hit a stretch of road that was rough and uneven, I get a lot of bounce in the front end and the dash and steering wheel vibrate like crazy. Have you experienced anything like that? I’ve notice it at highway speed and slower (40 mph) speeds. It’s almost as if the stiff front shocks are fighting the sumo springs.

    • Hello Danny,
      I have experienced that sensation, but I remember having it before we had the Sumo Springs as well. I don’t feel like the Sumo springs made it worse. If you ever find yourself on a washboarded dirt road, be ready to drive VERY slowly. Congratulations on your new purchase!
      Thank you,

  7. I have a 2002 39R Bounder
    Just going over the slightest expansion joint on the interstates feels like speed bump. It rides like a school bus. Will this system eliminate this ride?

  8. I wanted to know if you experienced any issues with over extension. You said the spring extends 50%. I made a mistake and listened to my Ford Heavy Truck man and put on air bags. The first unlevel campsite popped the bag on the right side. Not wanting to duplicated the experience, have you experienced any problems when your leveling jacks lift the coach very high, not with wheels off the ground?

    • Hi Carl, sometimes on unlevel sites the leveling jacks will bring the wheels off the ground but we just hit ‘cancel’ to bring the coach back down again and drive the RV up onto leveling blocks. We never park the RV with the tires off the ground and relying only on jacks = dangerous ad bad for your suspension. We remain very happy with our Sumo Springs 🙂

  9. Do you notice any improvement with harsh ride on bad interstate roads. I have changed sway bar setting which help with sway.i have a 30 foot fleetwood class A no slides 2003 . Great video I have no problem investing in those airbags if you think it will help harsh rides on bad roads .

  10. Thanks Marc and Julie. We (Glenn and Julie) saw the video when it first posted to Youtube and having a 2003 coach I was immediately interested in finding out more. We truly appreciate the content you provide on Youtube and are just now diving into your blog and new (sexy) web page.


  11. We love our Sumos! We had them added to our Allegro 36LA at around 10,000 miles (we’re at 21,000 now) and we could immediately feel the improvement, mostly in the side-to-side sway. They’re probably the #2 handling improvement we’ve made, right behind the 5-Star Tuning. -Mike & Kat

    • Great to know that Mike – you are the second person now to recommend the 5-Star Tuning – interesting they rank #1 above the Sumo’s! Will definitely have to explore that one next. Thanks for sharing!

  12. Great video thanks, I noticed you still have the old Bilstein yellow shocks. I just replaced mine after 30k miles with the new blue and silver comfort track Bilsteins and that improved the ride as well. I think the Sumo Springs may be my next upgrade.


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