The Hot Racing Traxxas X-Maxx Progressive Spring Set is an optional progressive spring tuning kit for the Traxxas X-Maxx. These multi-rate springs are soft at the beginning to soak up the small bumps, but transition (crosses over) to the stiff part of the rate to resist bottoming on jumps and other big hits.

Features:
Cold-coiled springs are designed to use with these progressive rates spring.
High quality spring steel construction
Three progressive spring rates provide additional tuning options for the X-Maxx to optimize the suspension for any environment
Specifications:
Length: 6.29 inch (160mm)
Inner diameter: 1.13 inch (28.8mm)
Outer diameter: 1.29 inch (33.0mm)

Includes:
(2) Black Ex Hard springs 2.8x33x160mm progressive
(2) blue Hard Springs 2.6x33x160mm progressive
(2) Red Med Springs 2.5x33x160mm progressive