Originally Posted by aley

Unless you don't keep proper pressure in them, you don't have to worry about 23s either. I hit one on a curb hard enough last night to buckle the frame, put a hop in the wheel significant enough that it'll have to be rebuilt with a new rim, and throw me violently on the ground - but I didn't pinch flat my 700x23 tire at ~100 psi. If a 23 can hit a curb hard enough to destroy the wheel without pinch flatting, I'd say that the pinch flat problem is strictly one of too little pressure. But of course, we already knew that.