We tend to prefer Zipp rimstrips to the traditional cloth these days because the Zipp rim strips are thinner and allow tires to install more easily and seat better especially with narrow rims and tight tire beads. Some tires tend to fit quite tightly and are very difficult to install with traditional thick rim tape. Designed for optimum performance with all clincher rims and there are 2 strips per pack for one pair of wheels. Say goodbye to sore thumbs and frustrating tire installation forever! An Excel Sports Boulder staff favorite.