Stan&';s yellow rim tape creates a durable air tight seal over spoke holes for tubeless applications and can also be used as standard rim tape. Designed to work with tubeless-ready rims and wheels. If you&';ll be inflating your tires to 45psi or less one layer of yellow tape in the bed of your rim is all you need for most rims. For road tubeless and similar tires that require more than 45psi of pressure a double wrap of tape is required. 21mm width rim tape is ideal for ~18mm internal width rims. Thin lightweight tape is designed to provide and airtight seal for tubeless setups Suitable for use as rim tape in non tubeless application Completely non-porous vapor barrier seals rim interior from moisture Natural gum rubber adhesive sticks where and when you want it to but leaves no residue Low friction surface helps tire beads slip into place