Here is the spur gear setup i made for my kid! its only 4g and very little rotating mass! made some for a few locals and no failures. we have a very hard set of doubles and so far his car is the only stock that can make them without raliling the berm in front of it, we are geared at 29/72 with a Fantom D4
Last edited by Matt M.; 03-11-2017 at 03:28 AM.