With the 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. - CYLEX 120 TPI ultralight casing - UTC rubber compound - Grip-Pod system helps maintain traction when cornering - Chemical etching on center tread creates a fine texture for enhanced traction - Multi-facet nano knobs provide additional traction on tire shoulders - ISO diameter: 451mm