Zero to fifty.
Your chic Italian floor pump might get your tubulars up to 220 PSI, but that's not ideal if you're just looking to put 25 or 30 into your knobbies before you hit the trail. Blackburn spends a lot of their time on tires measured in inches and not millimeters so they built this mountain bike specific Chamber HV Floor Pump to satisfy the off-roader in you. Its oversize barrel gives you more air per stroke than standard floor pumps, saving precious time and effort that could be spent riding. It's complemented with an oversize shaft for extra durability, along with an easy-to-read 4" pressure gauge at the base of the pump. For reaching your tires while your bike is up in the stand, they've extended the hose length to 47" inches, culminating with a rugged Anyvalve™ head that works on Presta, Schrader, and Dunlop valves. Plus, the air bleed button lets you have a do-over if you enthusiastically overshoot the mark.
50 PSI max inflation. Features a built in hose keeper and bottle opener. 28" height.
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So, I have been mountain biking for 20 years and finally bought a pump right for the job. What was I waiting for? The Chamber HV has a higher volume barrel so you can fill your tires faster. The gauge is calibrated for lower pressures since you are not likely filling your mountain tires to high pressure and accuracy at lower psi is pretty important. Pump head is good for either valve type and there is a convenient bottle opener at the top of the pump for a job well done (comes in handy around the shop!).
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What you need for a road ride.