The Air Tool Road Mini pump is designed to do two things well-inflate tubes quickly and stash easily in your gear. The reliable pump moves almost twice as much air as its predecessor, thanks to its inverted dual chamber design, giving you total peace of mind on days when pesky flats catch you off-guard. The inverted dual chamber design is smaller yet moves 58% more air per stroke compared to the previous design, reducing pumping time by up to four minutes. A Presta-only head with updated dust cover prevents the pump from opening due to vibration, while the machined outer barrel provides extra grip while pumping. The all-aluminum inner and outer chamber ensures durable performance.