Roadmaster Comfort Ride for 2017 Grand Design Momentum 350M

Published 06/16/2026

Question:

What to upgrade to road master easy ride. I have grand design 350m 7K axle. Whant to upgrade to 8k road master .

asked by: Michael S

Expert Reply:

Hey Michael! You can definitely add the Roadmaster Comfort Ride to your Momentum. However, the correct kit depends on your axle diameter. Since you have 7k axles, you can't add the 8k system to your toy hauler because it is designed for 3-1/2" diameter axles. You will need the # RM-2460-2570 instead which is designed for 7k axles with a 3" diameter.

It's also worth mentioning that there's really no advantage to going with the 8k system in this case, even if it was possible. The Comfort Ride system is engineered to work with your axle capacity, and the biggest improvement comes from the slipper spring suspension design and shock absorbers. This will control suspension movement while absorbing road shock, which helps reduce stress on the trailer and its components while providing a smoother ride.

Where are you headed next with the Momentum once you upgrade the suspension?

expert reply by: Robin H