A rim tape is a small but very essential part of the bicycle wheel. A good rim tape reduces and the risk of a flat tire. The job of the rim tape is to protect inner tube from others caused by spoke nipples, metal burrs and external matters. Rim tape you need Which is determined by the width on the inside of your rim. The rim tape must completely cover all spoke holes. The rim tape should neatly cover the rim bed. If the rim tape is smaller than the inner width of your rim, the rim tape can shift and thus accurately expose the spoke holes to the inner tube. This will increase the chance of a flat tire. It is even best to check with the manufacturer of your rim what the inner size of the rim is so that you can purchase the correct size rim tape.