This TT-02 chassis option part is a gear set featuring a newly-designed aluminum spur gear mount and spacer. It enables gear ratio settings from 9.82:1 to 6.55:1, and it can also be used in conjunction with a separately-sold 64T spur gear for lower gear ratios.
This is a must have item for anyone building a standard TT-02 kit. This upgrade is included in the TT-02R kit.
