Specialized Air Tool Road Mini V2 Frame Pump The best road mini pumps need to do two things - inflate tubes quickly and efficiently, and it also stashes away easily. Now available with a traditional frame-mounting bracket, the Air Tool Road Mini pump moves almost twice as much air as its predecessor thanks to the inverted double-chamber design. Key Features Inverted double chamber design is smaller yet increases the air handling capacity by 58% when compared to our previous design, reducing pumping time by up to two minutes Presta-only head keeps size and weight to a minimum while the dust cover keeps the insides clean Machined outer barrel for extra grip while pumping All-aluminum inner and outer chamber for durable performance Water bottle boss mount included Updated dust cover design prevents pump from opening due to vibration Max pressure: 100 PSI (6.9 bar) Volume-per-stroke: 30cc Water bottle boss frame mounting bracket included