Dan et al; I too remember the tale about the nuts not falling off as easily if left threaded on the left wheel, BUT, (stay with me here!)...... the laws of physics state that a body in motion tends to stay in motion and a body at rest tends to stay at rest. So, if you think about it, it makes sense that a right handed (clockwise) thread, when the wheel turns counter-clockwise would prefer to stay put and keep itself tight (counter to the wheel rotation). They shoud have put left threads on the right side!! Unless there is a "gyroscopic" influence here, it doesn't compute. Maybe it was a "Board Room" decision that the engineers wanted to see if anyone was awake up there! Maybe we should ask "Lefty"!!! Couldn't resist contributing 2 cents, John Cote