Thank you for the info, that will help me down the road if I run a non TCS GT Pro Spec race but for this build its not legal to make those changes. It looks like we are stuck with the 64/29 combo. This was just a cheap and easy second class at one of my local tracks.

1. Spur Gears permitted: Tamiya TT-02 stock and TT-02 Tamiya speed-tuned spur gears are allowed. TT-02: Stock 70T, Speed-Tuned 68T and 64T
2. Pinion Gears permitted: Pinion gear ratio options shown in the TT-02 kit and the speed-tuned gear set motor mount chart instruction manuals may be used. Finding ways to exceed the maximum gear ratio shown in the manual charts is not allowed. Maximum gear ratio from the speed tuned gear set: 5.74:1 (64T Spur-29T Pinion)