Originally Posted by Salkin

If you search this thread for the words "pinion", "spur", "gearing", "1900kv" etc. you will see that there is a lot of info on this.

Or check out the TLR setup sheets. It contains info on motor kv, spur and pinion. Most TLR drivers use a 1900kv motor, so there should be good info for you in the sheets.