ok,.... as soon as I get of the pondre 90T/48p and see if it is ....
I ask because with the electric motor that I have now, the Mamba 6900KV ... I can not put a smaller pinion than 23 teeth, as the engine hits the sub-frame, would have to look for a motor that has the bevel around the edges to put more towards the crown, otherwise I'll find a crown bigger, jejeje

Forgive my English but it is the google translator ....
later I'll post a picture of where the engine hits, now I have him as a pinion 23 with that of 87T/48p ....