If you've ever spent way too much time and expended far too many CO2 cartridges trying to seat a tubeless mountain bike tire with a floor pump better suited for skinny, high PSI road tires, you'll appreciate the utility of the Blackburn Chamber HV Floor Pump. It trades a low, 50 PSI/3.4 Bar max pressure for massive air volume to make quick work of airing up those knobbies, and its four-inch gauge lets you know exact pressures in both PSI and Bar measurements. Small touches such as a 47in hose for extra reach, a durably oversized main body, a hose keeper, and an alloy cap and lever on the pump head make this floor pump a lasting, convenient addition to your collection.