Made to fit
any 2-1/2", 5" and
5-1/2" diameter coil spring. For quick,
precise spring rate changes. These spring rubbers
are made
for racing from a special Polyurethane that
out lasts rubber 4 to 1. Maintains 95% of its
rate
at 180 degrees. Made in soft, medium and hard,
the rates are proportionate to the spring rate.