Lezyne Alloy Dirt Floor Drive Pump A precision High Volume floor pump Optimized for use with mountain bike tires Made with a CNC-machined aluminum barrel and base, steel piston, and varnished wood handle with an oversized contoured grip The barrel, piston, hose, and connectores are oversized to deliver doube the air flow per stroke ABS Flip-Thread Chuck and a 43" hose easily reach your Presta or Schrader valves 2-1/2" oversized gauge is precise and easy to read 70psi / 4.6bar