Small, efficient, reliable—the three key features of the Air Tool MTB Mini pump. With the inverted dual chamber design, this pump moves 20% more air per stroke than the unit it replaced, yet is 10% smaller.

• Inverted dual chamber design is smaller yet moves 20% more air per stroke when compared to our previous design, reducing pumping time by up to two minutes.
• Twist locking head is easily converted to fit Presta or Schrader valves.
• Machined outer barrel for extra grip while pumping.
• Aluminum inner and outer chamber for durable performance.
• Water bottle boss frame mounting bracket included.
• Max pressure: 60 PSI (4.1bar)
• Volume-per-stroke: 55cc