I know that reducing tire friction in pinewood derby racers often involves A. shaving the tires super thin, and B. adjusting the axels so that not all of the tires are in touch with the racing surface. I realize that one of the main differences is that pinewood derby cars ride on a rail, granted however has anyone tried running toed out or toed in wheels so that the edge of the wheel is what makes contact rather than the foot of the wheel? I'm not asserting that this would be good or bad. In fact I'm asking because I have no idea. I do know that the fewer tires in contact with the track the less friction which should result in a faster time.