Resurrected from the archives yet modernised with the same fe analysis as the fast trak we39ve brought the ground control back for the masses with adaptive tread technology we39re able to offer xc trail riders the most fastest grippiest tyre for all conditionsgt casing 60 tpigt bead wiregt compound 70agt 26quot x 21 psi 35 65gt 29quot x 21 psi 35 65