I have been on a flat tire jag. Seems like I was getting them all the time. I finally figured out it was the rim tape. I got that fixed and then had a flat the other day that was on the outside of the tube. There was nothing in the tire. The hole was on a fold that felt like a thin spot in the tube. Since there is no bike shop in town, I had to buy this one at Wal Mart. Anyone have a recommendation on higher quality tubes that don't have thin spots?