I recently saw a clip of a video where it showed a closeup of a rider using wire cutters to cut the knobs on his DH tires.

I couldn't tell if he was cutting key ones off or putting an edge or point on them. My first thought was that he was angling them or putting a point on them for better traction, but I'm not sure. Maybe he was creating a pattern for the soil of the day...I don't know.

Does anyone know anything about this technique?