Would that be 136:1 total ratio? Thanks for the info and tear down video! Running Ryobi 40v with a cheap $25 esc and variable speed throttle pedal on my stock motors and gearboxes. It goes about 10MPH. The kids have been hammering on it for weeks now. Only killed the direction switch so far. I was able to open the switch up, remove some of the melted plastic and send it back to battle ;-D Cheers!