All the rebound with no control has a great effect on stability and adjustability. If you try to tighten your trucks with no damping, a lot of the time the bushing just squishes, and you get no more tension. SHR => Super High Rebound!40% higher rebound than the classic formula.White, 94a.- Sold as indivual bushings!- 2 Bushings Needed per truck- 4 Bushings Needed per complete board