The 3Racing CAC-139B front damper shaft is produced to support precise tuning of damping characteristics on the Cactus 2WD. It helps deliver repeatable shock behaviour so setup changes have predictable results during race sessions.
Intended for competitive use, the shaft reduces lateral play in the damper stack and promotes stable piston movement. That steadiness aids suspension setup work and improves the correlation between shim, oil and spring choices.
Matched to the Cactus 2WD front dampers, this shaft installs into the original shock components without complex modification. The part supports common tuning workflows and helps racers extract consistent handling across multiple runs.