The Air Tool Flex Pump uses an inverted camber design that allows for quick fill-up on mountain tires, yet it can still reach the high-pressures needed for road tires.

This durable frame pump with SwitchHitter head automatically adjusts for Schrader or Presta valve tubes, plus it shows pressure on a rotatable gauge.

Designed for Fat and Semi Fat tire bikes, the Air Tool Big Bore Pump packs massive volume-per-stroke, and it features a head that still works with winter gloves on to make it perfect for backcountry winter fat biking.