I was a bit reluctant to "quick fix" my sagging leaf springs, but the spring helpers worked as advertised. They gave me an extra inch of buoyancy (maybe even a little more). I would say they have cured 75% of my rear tire issues which have been good at breaking a wheel when going over bumps in the road. The ride is great - not too hard like I've heard some people say. I'll measure again in a month to see if I'm losing buoyancy. Significantly cheaper than buying new leaf springs.