6 cell stock

[Pro_3_racer]

hey guys

i have a RC12l3 and i was wondering what gearing/ pinon should i run with a stock motor and 6 sanyo 2000 cells and 6 cell Gp 3300, hope you can help, oh the spur i run is a 75 tooth

hope you help me

thanks
Michael

[glyn ward]

you want 35-42mmpr should be alright on 2000