TAMIYA TT01 Graphite Main Shaft with Alloy Ends GTT025 by GPM  [GTT025]

Graphite main shaft upgrade for TT01 drivetrains

This aftermarket graphite main shaft is fitted with precision alloy end fittings for use in scale TAMIYA TT01 transmissions. The shaft pairs a torsion-stable graphite centre with machined alloy ends to deliver a compact replacement that maintains original gearbox alignment and bearing contact.

It is intended specifically for TT01 layouts and swaps into the stock transmission without changing gear geometry. Fitment requires lining the shaft with the existing retainers and using the original hardware to secure end positions, keeping the same assembly relationships as the original TT01 setup.

For tuning, the graphite body helps moderate torsional response while the alloy ends ensure repeatable seating and interface with bearings and gearbox housings. Inspect bearing fit and end seating after initial runs to preserve consistent power transfer during setup and track use.