Associated RC18T 55T Aluminium Main Gear AR055T by GPM  [AR055T]

55-tooth aluminium spur for RC18T use

This 55T alloy main gear is produced for Associated RC18T applications and comes as a single piece. It functions as an aftermarket spur designed to replace a 55-tooth stock gear in the RC18T drivetrain.

Forged from aluminium alloy to retain the original gear profile, the part is intended for installation without altering the gearbox. When fitting, confirm pinion-to-spur mesh and clearance around bearings and the motor mount, fasten with the original hex screws, and verify smooth rotation before operating the vehicle.

Swapping spur sizes is a practical tuning technique to change the final drive ratio, affecting launch performance and top end on track. Perform routine mesh and mounting checks after any swap to reduce wear risks.