This is tensilized polypropylene (TPP) tape we recommend using with all our rims. Our rims are designed to be run tubeless without the need for a thick, heavy rimstrip. This tape is thin and extremely lightweight yet surprisingly durable. Available in widths from 24 to 30mm to fit all our rims. This tape can also be used as a lightweight rim tape (with tubes) as long as the pressure is kept below 40 psi. We recommend replacing your rim tape yearly or more often if you change tires frequently.