Rookie question... I got a flat from one end of a small carpenter's staple. Put in a new tube. Inspected inside of tire but didn't find the hole. After reassembling and pumping up the tire to 120 I see the hole on the outside. It's a straight hole, not a slit like from glass and it doesn't bulge at all at that point. Is there a high, medium or low risk of that hole pinching the tube in the inside? What's your guideline for when you a) do the dollar bill thing to protect the tube or b) go to a new tire? Thanks in advance.