Originally Posted by Deves

Hi ya'all I've got a small problem maybe someone here can help. I installed a novak 13.5 brushless system in my cyclone and i'm trying to get a FDR of about 4.5 to 5. in 48 pitch for asphalt racing. What spur/pinion combo should I use that will fit in this car? Right now I have a 77 and 78t spur gear. I thought about trying a 72t spur Thanks for any help/ideas you have.