Specialized's Air Tool MTB Pump packs a wallop. Equipped with a durable, lightweight aluminum body, handle and shaft, this compact pump easily fits in a pocket or pack, and sports a large-volume barrel that inflates mountain bike tires quickly. The Air Tool is compatible with Presta and Schrader valves and has a thumblock head with a sturdy stainless-steel lever. Featuring a handy storage chamber for patches, the handle locks with a simple twist. There's even a handy mounting bracket that attaches to your bottle-cage screws.