The best road mini pump does two things well—it inflates tubes quickly, and it stashes easily.The reliable Air Tool Road Mini pump moves almost twice as much air as its predecessor, thanks to its inverted dual chamber design. It gives you total peace of mind on days when pesky flats catch you off-guard. Inverted dual chamber design is smaller yet moves 58% more air per stroke when compared to our previous design, reducing pumping time by up to four minutes. Presta-only head with updated dust cover prevents pump from opening due to vibration. Machined outer barrel for extra grip while pumping. All-aluminum inner and outer chamber for durable performance. Water bottle boss frame mounting bracket included. Max pressure: 100 PSI (6.9 bar) Volume-per-stroke: 30cc Volume-per-stroke: 30cc Water bottle boss frame mounting bracket included.