Originally Posted by
Leebo
You are looking at a deflated tube. Think about when it is inflated. The tube is stretched. Correct?
2-3x stretch? No. Are you disbelieving that there would be 2 layers of tube under each side of the rim, or do you believe that every obstacle that you might hit is so perfectly level and square that it hits both sides simultaneously to within the thickness of a tube, but only punches a hole in one layer?