From the manufacturer

The JoeBlow® Sport with unique 2-stage design delivers both high pressure and high volume in record time. Stage one opens both barrels for huge volume, reaching 30 psi with 30% less effort than standard floor pumps. Stage two utilizes the small barrel for pressures up to 160 psi. Hammer type TwinHead® DX5 pump head with an extra-long and tangle-free hose makes it easy to reach valve stems. A durable steel barrel and large steel base provide extra stability.

Features

• Stage 1 opens both barrels for huge volume (715cc per stroke), reaching 30 psi with 30% less effort than standard floor pumps;
• Stage 2 utilizes the small barrel (258cc per stroke) for pressures up to 160 psi
• Hammer type TwinHead™ DX5 fits Presta, Schrader and Dunlop valves
• Durable, painted-steel barrel, hardened-steel base, oversize dual-density polymer handle and extra-long 360° pivot hose all make it easy to pump tires
• 3 in. analog gauge displays pressures up to 160 psi (11 bar) ; Stage1: 0–30 psi, Stage 2: 30–160 psi
• Includes ball and bladder heads and a hose doc

Specifications