I installed the Firestone Ride Rites on my Class C unit a couple months ago. I had a couple reasons why, I was leaning to one side and not level front to back. My unit is a 1989 so it has some years on it. It was sagging to the point that the levelers wouldn't retract. After I got them installed I can level it both front to back and side to side, it made the ride better as well and feels more stable on the road. I can't comment on the Sumo springs since I have never been around them.
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Rick, Mimi plus Remy and Bentley, our pups
2012 Jayco Greyhawk 31SS
Toad: 2008 VW New Beetle Convertible SE
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