Specialized Crossroads Tyre 700c The tyre's smooth rolling centre tread and its knobbly tread shoulders make it the perfect town and country all-rounder tyre whether the roads you ride are smooth, dirt or gravel. The smooth centre tread reduces rolling resistance and enhances speed potential. The tyre's side knobs offer extra traction when you take a dirt road detour. Hard wearing 70a compound for longevity. The tyre's Flak Jacket sub tread is a proven puncture deterrent. Wire bead. Recommended tyre pressure: 75-100psi (700x38 tyre). 'From unpaved paths to city streets, the Crossroads performs reliably and consistently with a smooth centre tread section and substantial side knobs for traction and off-road stability.' Specialized.