TA05 centre pulley tuning kit 16T 17T 18T - TA05-21A by 3Racing  [TA05-21A]

Centre bulk pulley for TA05 tuning

The TA05-21A centre bulk pulley set provides three selectable pulley sizes - 16T, 17T and 18T - tailored for the Tamiya TA05 touring car range. This is a scale replacement part designed to sit in the centre bulk assembly and interface with the original driveline components on TA05, TA-05IFS and TA05-R cars.

It is only compatible with the TA05 variants shown and is not a universal gearbox component. The kit is intended to let drivers alter centre pulley tooth count quickly so they can refine acceleration, midrange and top speed balance for different track surfaces and racing conditions. These changes affect the final drive behaviour rather than adding new parts to the gearbox.

Installation follows standard TA05 centre bulk access procedures: remove the centre cover and relevant drivetrain items, swap the pulley to the desired tooth count, confirm gear mesh and axial alignment, then reassemble using original fasteners. Manually spin the drivetrain after reassembly to check for smooth operation before applying full power.

Pair this pulley set with pinion, spur or ESC adjustments during setup work. It is intended for model use only and not for any real vehicle application.