This is a pack of two "Green - 0.762 Rate" Traxxas Progressive Rate XX-Long GTR Shock Springs. These are one step softer than the medium rate progressive springs available for the XX-Long shock (TRA7462X). Traxxas offers a wide variety of spring rates for the GTR shocks to provide almost limitless tuning possibilities. The springs are made from high-quality spring steel with durable powder-coated finishes, and the spring rate is indicated by colored dots on the end of the spring. XX-Long Spring Rates: Softest TRA7442: Orange - 0.711 Rate TRA7443: Green - 0.762 Rate TRA7446: Black - 0.874 Rate TRA7447: Pink - 0.884 Rate TRA7449: Blue - 1.004 Rate Hardest Effects of Shock Spring Changes Shock Spring Characteristic Softer Increased Chassis Roll Increased Traction Better in Bumpy Conditions More Likely to Bottom Out Stiffer Decreased Chassis Roll Decreased Traction Increased Responsiveness