Pirelli, P ZERO SmarTUBE EVO, TPU Tube, Presta 42mm, 700C, 25-28C

-5% 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 Polyurethan