Incidentally, the large rear wheels in drag racers is an example of a variable torque wheel design: http://www.youtube.com/watch?v=3Ug6w4ZjwVo#t=55 http://www.

Incidentally, the large rear wheels in drag racers is an example of a variable torque wheel design: http://www.youtube.com/watch?v=3Ug6w4ZjwVo#t=55 http://www.youtube.com/watch?v=3Ug6w4ZjwVo#t=55