Hi! In previous log I told about problem with connection gearbox to shafts, but I don't shown and explain what gearbox is. Transmission consist of two stages, first is gearbox from cheapest cordless screwdriver, which include planetary gear, second is are pair of gears from two different bicycles and chain.

The planetary gearbox consists of two stages, the gear ratio is about 7.9 for each of them. I will use only one and for connecting this gearbox to motor shaft I need to replacing carrier of this stage for new one with muff. Plus second output carrier must be replaced by custom to connecting to small gear from bicycle.

Pair of the bicycle gears I will use for transmission torque from motor shaft to wheels. This pair have a small ratio is about 1.5.