Doesn't matter what I'm riding, I always hang off some in the curves if I'm doing sporty riding, however, I've never drug my knee. The knee comes close, but has never touched down. I used to think racers hung off and drug their knees just for show, but I then thought there had to be a reason. So one day I was riding my bicycle on the driveway with my daughter and I did something that I had done as a kid and just forgot about it. I stood up on the pedals, shifted my body to the left and made a sharp left U-turn while the bicycle stayed straight up. Aaahhh!! The light came on then. Hanging off allows one to turn sharper without near as much lean angle. Pretty neat.