Has something to do with that when you pull the bars the bike will tend to lean instead of turning the tire 'cause the tire is rolling and wants to keep going straight. It's some kind of gyroscope effect or something. That's why you lean to turn at speed. I stopped trying to figure that one out a long time ago. It just does is good enough for me anymore. I know, I know. I suck and was absolutley no help. You can punch me in the face when you find me. MIKE.