TOPEAK FLOOR JOE BLOW SPORT 2-STAGE YLThe 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