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

Replacement alloy main shaft for TT02 series

This machined alloy main shaft is an RC-scale drivetrain spare for Tamiya TT02 and TT02B chassis platforms. Supplied as 1 pcs, the shaft replaces a worn or damaged main shaft during routine maintenance or when refining driveline performance.

Fitted into the centre transmission assembly, the shaft transfers torque from the motor and spur assembly to the downstream gears; on installation check shaft orientation, inspect mating bearings for wear, and set correct endplay to avoid binding. Reuse the original mounting hardware and retainers rather than substituting unspecified parts.

Replacing a bent or fatigued main shaft restores concentricity and reduces driveline vibration, helping to maintain consistent power delivery and extend the life of spur gears and bearings. This item is an aftermarket spare or upgrade and does not change chassis geometry or suspension settings.