Surly 65mm Rim Strip Surly's Rim Strips are the truth. They only do a few things, but they do them very well. With a smooth Nylon composition, they make a secure fit for the inside of your rims. They're great for protecting your tubes, and they make a real nice seal if you're rollin tubeless as well. Don't sleep on these. Features Fits 100mm wide rims Comprised entirely of Nylon | Surly | 65Mm Rim Strip | Black | 65Mm, Clown Shoe | Nylon