Surly Knard 650b x 41mm Tire If you're looking for a tire that rolls fast with a small block tread pattern but doesn't sacrifice traction, the Surly Knard is your tire. The Knard has a densely packed center with small knobs for superior low rolling resistance. As you move to the outside of the tread the blocks become more widely spaced providing good traction and high-speed cornering. The Knard was designed for aggressive cross-country riding and comes in a wide range of sizes so any bike your riding can be fitted up with a Knard. Features Tightly-spaced, low-block tread patternbalances speed and grip Low rolling resistancefor ultimate efficiency Available in tubeless and non-tubelessversions means there's a Knard for every bike SPECIFICATIONSSize Black, Clincher, 33tpi, 650b x 41, Wire Bead, Non-Tubeless Black, Tubeless, 60tpi, 650b x 41, Folding Bead Wire Folding TPI3360Compound-Protection None Sidewall Tubeless Compatible No Yes Intended Use Gravel, Pavement, Light Trail Gravel, Pavement, Light Trail Approximate Weight610 grams510 grams | Surly | Knard 650B X 41 Tire | Black | Clincher, 33Tpi, 650B X 41, Folding