Some people do lean on their knees hard and burn through pucks very fast. When I first started racing, I destroyed a set of Spidi pucks during a 2 day trip to Pahrump NV. It was crazy. Now, however, its more of a gauge. My knee will lightly touch when I'm leaning so I know about where my angle is at. If I have my knee sucked in against the bike more and its touching, well I know I'm really close to the edge. Its good to have your knee down or close because you can save your bike when the front washes out by putting more support on the knee. Either way, dragging alot or barely touching, it should always come in contact smooth and soft, never hard enough to hurt your knees.

Find me the next time you are out and we can go over body position, check your pegs and riding ergonomics