Traxxas GTM Shock Spring. These optional springs give you the ability to tune the suspension on your TRX-4M rock crawler. Traxxas offers a wide variety of spring rates for the GTM shocks to provide almost limitless tuning possibilities. Package includes two 0.072 rate springs.
Softest
TRA9757: 0.072 Rate
TRA9758: 0.095 Rate
TRA9759: 0.123 Rate
TRA9760: 0.155 Rate