The Lezyne Alloy Drive is an ultra-compact hand pump for MTB use. It’s made from 100 custom CNC-machined aluminum for precise and lightweight operation. Despite its small stature the Alloy Drive fills fat tires with ease. The secret is HV High Volume technology which inflates typical mountain bike tires to riding pressure with 30 fewer stokes. The integrated Flex hose creates an airtight seal against the valve eliminating the need to hold the pump head during inflation and helping prevent damage to fragile Presta needles. For easy removal the ABS Air Bleed System allows users to release air pressure in the pump hose after inflation — no elbow grease required. The head is reversible for use with Presta or Schrader valves and the hose conveniently stores inside the pump handle when not in use. Size Small. High Polish Black.