Tamiya TL01 38mm Hard Steel Universal Swing Shaft Upgrade TL1238S by GPM  [TL1238S]

TL01 driveline reinforcement

This hard steel 38mm universal swing shaft set is intended for the Tamiya TL01 chassis, model TL1238S. The pair replaces stock swing shafts with a stiffer steel alternative to reduce play and slow wear without altering chassis geometry.

The set comes as one ready pair for direct swap in TL01 applications. Installation generally requires removing wheel hubs and drive cups, fitting the 38mm shafts in place of the stock items, and checking clearance across suspension travel and steering throw. Use the correct fastener torque for the TL01 layout and confirm fit with your existing drive cups and universal joints before final tightening.

From a tuning point of view, moving to hard steel shafts increases drivetrain stiffness and longevity, yielding crisper power transfer while adding a small mass penalty versus lightweight alloys. Choose this option where reduced axial play and greater durability matter, such as track practice or frequent running.

Select these 38mm hard steel shafts when you want a simple steel replacement for TL01 swing shafts that emphasises durability and reduced driveline play, and always confirm drive cup compatibility before fitting.