Tioga Fastr X (wire bead) 24 X 1.75TIOGA Fastr X TyreTHE FASTR-X IS OUR MOST VERSATILE RACE TIRE TO DATE. Increased strategical placement of Grip-Pods matched to multi-facet Nano Knobs on shoulder and sides, capped off with friction enhancing chemical etching over the central tread, FASTR-X strikes the rarefied balance of speed and control like none before. Features- 60 TPI Casing- UTC Rubber Compound- Steel Bead- 20 x 1.85 (O.D. 515mm): 385g - 20 x 1.75 (O.D. 507mm): 340g - 20 x 1.60 (O.D. 494mm): 325g - 20 x 1-3/8 (O.D. 530mm): 350g - 20 x 1-1/8 (O.D. 516mm): 330g