Running the RX8 with Tekin 1900 motor. Geared 46/19 indoor (WCRC) and 46/20 on large outdoor track (Revs)

You can also get away with gearing 46/20 all the time and just limit your throttle.
ok, that's for a 1900kv teking. What about the 2050kv teking ? what would be the pinion size 46/????