Originally Posted by Junster
Ok Max, any crank with a sprocket attached could be put on the left side and the right side rear and cut the pedal arms off. With aluminum ones it would be easy to make them look nice. That takes care of the motor drive. Then you can use the freewheel cranks from SBP on just the front bottom bracket.
I thought of doing that too but I did not want to have the front sprocket spinning (more friction). If all else fails Ill do that. also the tandem bike I have has one piece style bottom brackets (2") so it would be an added expense to put a conversion kit on both bottom brackets. I found some BMX bearings that fit the 2" bottom bracket but the inside diameter is 22 mm. Staton sells 7/8" keyed shaft adapters. Does anyone know if a 7/8" shaft will fit a 22 mm opening diameter? its a difference of only 0.008858268". Are tolerences that critcal?