Above 12-15 MPH, .....gyroscopic precession, where the input to the wheel (forks, handlebars) produces a reaction 90 degrees later.Bugman said:I've always wondered this about bikes, I just never remembered to ask. Why is is that if you want to move the bike left, like when changing lanes, you pull back on the right grip? It doesn't make any sense to me. Can someone explain why this hapens? Thanks.