Hi :) I have a question or maybe something more like a mind puzzle (at least for me The drivers of MotoGP touch the ground with their knees while turning. For this purpuse they wear knee sliders made of rubber. Now I was thinking how it would work if they added a small wheel to the knee sliders. This way there would be less friction and they could lean more. Or am I wrong? Can somebody explain the physics behind this dragging your knee on the ground?