Turn your springs into Progressive Springs
The urethane bump rubber is designed to turn a liner spring rate into a progressive spring package. The ½” conical bump rubbers work in conjunction with the standard 1-5/8” spring. The urethane bump rubbers serve two purposes on the right side of the chassis. The first is an opportunity to create a progressive spring rate to help free the chassis up. The second is to have the ability to run a softer main spring and then add the bump rubbers to get the desired spring rate. This package helps the chassis through the bumpy irregular parts of the race track.
(10) Divider Washers
(5) Bump Rubbers 30 Duro.
(5) Bump Rubbers 40 Duro.
(4) Thin Washers