I'm not sure about the "less contact patch while leaning" thing. let me explain. traction is finite.we can use all of it for accelerating or braking while vertical but the more we lean the more cornering forces come into play.as we enter a turn we add lean angle and progressively / proportionally release the brakes.on exits as we pick up the bike we progressively/proportionally open the throttle. so I think it has nothing or little to do with contact patch? In fact track/race tires have more contact patch at lean,right?