B bibleguy New member Mar 4, 2011 #1 are ridden on the road.? A bicycle wheel with a friction roller motor on the tire forms a class 2 lever, and a wheel with a hub motor forms a class 3 lever.
are ridden on the road.? A bicycle wheel with a friction roller motor on the tire forms a class 2 lever, and a wheel with a hub motor forms a class 3 lever.
