Despite the small size, this 2nd generation of the popular Air Tool MTB Mini Pump is now more efficient, delivering more air per stroke thanks to the inverted double chamber design by increasing the air handling capacity by 20%. That makes a difference over numerous strokes. The head is a twist-lock design, and can be manually changed for Presta and Schrader valves.

The construction is aluminum for both the barrel and the internal shaft, keeping it lighter and plenty stiff. The outer barrel is machined to offer more grip and control. The max pressure is 60 psi, and the output is 50cc per stroke. A water bottle boss mounting bracket comes with this specific version.