The dual chamber telescoping design maximizes the amount of air going into the tire for effortless inflation. The Presta valve-only compatible head also features a built-in CO2 inflator for lightning-fast roadside repairs. Attach the included bottle cage mount to most bikes for an easy carrying solution or simply stash it in a jersey pocket. Not only can the CNC-machined aluminum CO2 Road Mini Pump get you back up and pedaling in no time, but it's also built to last ride after ride.