Tamiya TT02/TT02B Alloy Main Shaft by GPM TT2B025  [TT2B025]

Alloy main shaft for TT02/TT02B

This replacement main shaft is an RC-scale drivetrain component produced by GPM for use with Tamiya TT02 and TT02B chassis platforms. Supplied as 1 pcs, the shaft is intended to replace a worn or damaged main shaft during routine maintenance or when refining drivetrain performance.

Installed in the centre transmission assembly, the main shaft transmits torque between the motor/spur assembly and downstream gearing; when fitting, verify shaft orientation, check mating bearings for wear, and ensure proper endplay to avoid binding. Use existing mounting hardware and retainers from the original assembly rather than substituting unspecified parts.

For tuning, replacing a bent or worn main shaft restores concentricity and reduces driveline vibration, which can improve power transfer consistency and reduce premature wear on spur gears and bearings. This part is an RC-scale upgrade or spare rather than a change that alters chassis geometry or suspension settings.