B4 Gearing
 

Hi

What pinion size should I run in my B4 with standard spur and 10.5 brussless??????

last time I used that combo I was on 27/28 with 72 spur

that was Tekin esc & motor on 2s lipo indoors @ Worksop

I would start with a 25 tooth pinion :thumbsup:

25 sounds like a good starting point with the stock spur...if it feels too slow try to add some timing to the motor