Tamiya TT01 Replacement Alloy Main Shaft TT025 precision part by GPM  [TT025]

Durable alloy main shaft for TT01 applications

This alloy main shaft is an RC replacement intended for Tamiya TT01 chassis repairs and upgrades. It operates as the drivetrain's direct-drive shaft and targets reduced play under load when compared to standard shafts.

Fitting requires dismantling the drivetrain to remove the original main shaft and to inspect bearings and gears for wear. Check spline alignment and bearing seating prior to final assembly, and use the TT01 manual's recommended thread locking and torque figures; the part retains factory mounting geometry and does not alter layout.

In setup terms, a stiffer alloy main shaft can affect drivetrain stiffness and the information passed back to the motor and spur gear mesh. Make swap decisions based on observed shaft flex or play and confirm handling changes with controlled test runs.