Class C RV Suspension Upgrades: How to Reduce That Rock-And-Roll Motion
RVs, be they Class A motorhomes, Class B camper vans, or Class C cab chassis coaches, provide the creature comforts to make getaways an enjoyable experience. Where improvements can be made is in reducing that rock-and-roll of the body during travel.
The ride and handling of an RV play a big role in how fatigued the driver and occupants become after hours on the road. The more the coach rocks from side to side in transit, the more stress it places on everyone inside. This is due to our bodies naturally reacting to maintain balance in the seats.
An RV’s side-to-side rocking and body lean also stresses its structural components, drawer, and cupboard latches. It will also jostle any fragile items stored in the coach. Class C RVs are heavy, tall, and narrow, which inherently creates a lot of back-and-forth motion when exiting a parking lot or cornering
Anti-Sway Bars Reduce Class C RV Body Lean
RV manufacturers help reduce the severity of “body roll” by employing an anti-sway bar at the rear axle. This is a spring in the shape of a round bar connected to the axle housing and the frame rails.
As the coach leans, the anti-sway bar resists the upward movement on one side and the downward movement on the other.
To further reduce body lean and the subsequent back-and-forth rocking motion that follows, you need to replace the OEM anti-sway bar with a larger, stronger aftermarket version along with better quality rear shocks. (Shocks control the movements of the anti-sway bar, just as they do with the rear springs.)
Suspension Mods Easy For RV DIYers
Owners of Class C RVs built on the popular Mercedes-Benz Sprinter 3500 DRW chassis can find one such solution in the wide array of SuperSteer RV’s suspension offerings. And the products can be installed by just about any RV DIYer with basic hand tools.
One product is the SS110 anti-sway bar, and the other is the SS88-1889 shocks, the latter developed exclusively for SuperSteer in cooperation with KONI. Both products are direct-replacement bolt-on upgrades most DIYers can handle installing with ease.
Installing the SuperSteer anti-sway bar reduces the body lean on a 2021 Winnebago Navion by more than 60 percent, according to testing done at Henderson’s Line-up RV center, and the new custom-tuned KONI shocks reduce residual back-and-forth rocking by more than 35-percent.
Upgrading The Suspension Improves Class C Handling
The combination results in a much more stable ride and smoother handling, especially when navigating mountain, coastal, rural and other roads that have a lot of corners and off-camber sections. The stiffer anti-sway bar also helps reduce the adverse effects of wind gusts and side winds.
These small suspension upgrades to the Sprinter 3500 DRW cab chassis significantly improve ride and handling, reducing driver fatigue while making the ride for the passengers more enjoyable.