I have a bad right knee, and I have my bike set up so I can casually ride my bike with almost full leg extension. This takes pressure off of my knee when I ride, and helps to prevent knee pain. And YES, I have to lean either to the LEFT or RIGHT when I stop my bike. I moved the seat further forward so I'm closer to the cranks on my pedal forward cruiser. I definitely have to tippy toe to stay upright,...but I'd have inadequate leg extension if I DIDN'T have the seat so high up,...and my knee would be in worse shape. Correct leg extension helps prevent pain and further injury,...riding with a huge bend in the knees puts undue stress on the joint.