This is an optional XRAY Progressive Spring Set, and is intended for use with the XRAY T3 and T2 family of 1/10 Scale Touring Cars. These XRAY shock springs feature a stylish black finish, and the rate has been laser-engraved on the top spring coil for easy identification. These progressive springs provide a softer damping at the beginning of the compression then become harder as the spring becomes compressed.
Available as a pair, the springs are individually measured, controlled, inspected and matched to provide identical damping characteristics. During the selection process, each spring is compressed in several fine increments and the values are recorded. Each spring is then matched with another spring of identical characteristics. XRAY goes the extra mile to ensure perfect spring match-ups, giving your car the predictability and consistency that you need to help you lead the pack.