NewGenuine SpecializedMini MTBAir Tool PumpQty: 1Part Number:47219-3015Despite the small size, this 2nd generationof the popular Air Tool MTB Mini Pump isnow more efficient, delivering more air perstroke thanks to the inverted double chamberdesign by increasing the air handling capacityby 20%. That makes a difference overnumerous strokes. The head is a twist-lock design,and can be manually changed for Presta and Schrader valves.The construction is aluminum for both thebarrel and the internal shaft, keeping it lighterand plenty stiff. The outer barrel is machinedto offer more grip and control. The max pressureis 60 psi, and the output is 50cc per stroke.A water bottle boss mounting bracket comes with this specific version.FeaturesMini-pump designed for standardvolume MTB tires (generally up to 2.4")Updated, inverted double chamber designincreases the air handling capacity by 20% compared to the previous generation, reducing pumping time by up to two minutesTwist locking head reduces size and canbe easily converted to fit Presta or Schrader valvesAluminum inner and outer chamber for durable performanceMachined outer barrel for extra grip while pumpingVolume-per-stroke: 55ccMax pressure: 60 psi (4.1bar)Water bottle boss bracket includedColor: Black