This is a pack of two "Orange - 0.623 Rate" Traxxas Progressive Rate Long GTR Shock Springs. These are the softest progressive springs available for the Long shock (TRA7461X). 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.

Long Spring Rates: 

Softest

TRA7440: Orange - 0.623 Rate

TRA7441: Green - 0.653 Rate

TRA7444: Black - 0.767 Rate

TRA7445: Pink - 0.810 Rate

TRA7448: Blue - 0.892 Rate

Stiffest 

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