Originally Posted By: eljefino
"Emerging grooves"-- now those sound kind of whacky.
I imagine the rubber flaps that cover these grooves wearing away until they break away one at a time, making for a funny looking tire.
I don't think there will be rubber flaps. It looks like (from the poor picture of the drawing)the tread is shaped like a trapezoid. As the tread wears down it will provide more of a grove to channel water since the tread is thinner (width, not depth) near the center of the tire.