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

Centre pulley option for TA05 chassis

The TA05-21A centre bulk pulley pack includes three pulley choices (16T, 17T and 18T) engineered for the Tamiya TA05 family of 1/10 touring cars. It is a model-scale replacement part that fits into the centre bulk area and works with the existing drivetrain components on TA05, TA-05IFS and TA05-R variants.

Compatibility is restricted to the TA05 variants listed and this is not a one-size-fits-all gearbox piece. The goal of the set is to let racers and hobbyists change centre pulley tooth counts quickly so they can balance low-end drive and top speed without opening or modifying the gearbox shell. Changes alter final drive characteristics rather than introduce new gearbox hardware.

Fitment follows common TA05 centre-bulk procedures: remove the centre cover and related drive parts, replace the pulley with the selected 16T, 17T or 18T item, check gear mesh and alignment, then reassemble with the original screws. Spin the drivetrain by hand to confirm smooth rotation before powering the model.

Treat this part as a tuning tool to use alongside pinion, spur or ESC adjustments. Intended for model use only; not suitable for real vehicle application.