Pirelli P Zero SmarTube EVO Tube - 700 x 25 - 28mm 60mm Presta Valve Touchscreen-Yes Traditional circular cross section

Traditional circular cross section

But many skiers reported that more damping would make the ferrule even better

Also a great fit on the Specialized Stout crankset

New 1/4 turn makes entry and exit easier and faster

Carbon Cuff is shaped to match the natural shape of the foot for maximum stability and power transmission

Pirelli P Zero SmarTube EVO Tube - 700 x 25 - 28mm 60mm Presta Valve Touchscreen-Yes Traditional circular cross section5% faster than Previous SmarTUBE 70% weight savings compared to conventional tubes 50% smaller than conventional tubes 42mm valve stem = 35 grams Not for use with rim brakes Not designed to be repaired Constructed of Thermoplastic Polyurethane TECH SPECS Wheel Diameter 700C Shaft Type Non threaded Tube Width 25 28C Tube Weight 38g Valve Length 60mm Valve Presta