This is the Multi rate Spring Set for the Traxxas Front Shocks used on the Slash, Rustler and Stampede .
FEATURES:
Spring Steel Construction Multi-Rate Springs, Dual-Rate (DRS) allow the optimum spring rate for each application. These multi-rate springs are soft at the beginning to soak up the small bumps, but transitions (crosses over) to the stiff part of the rate to resist bottoming on jumps and other big "hits. "