Originally Posted by BIG DADDY8
I got a HPI RS4 electric(first gen) for my daughter to run and in the book and on HPI it says it has a 106t 64 pitch spur gear. What is the correct one for the 48 pitch to run? 81, 84, ect?
Yeah, right around there. The Xray has an 87 tooth spur and most guys are running the 116 tooth because it is the same size in diameter as the 87.
I would say a 112 would be close.