What defines this as a mountain bike pump, though, is its focus on volume.
One of the few metal pieces-the base-is nicely shaped, with plenty of foot space and a wide enough stance to keep the pump stable, and grip tape keeps it tacky underfoot. But realistically, the plastic parts will probably outlive the wear components several times over. The handle and body are deliberately roughly machined, with a knurled ring segment for extra grip and the inverted design means the head is long enough that you don. The alloy body and shaft are stiff so it slides smoothly with no flex or handle/head contact even when you’re pumping hard.
Utilitarianism is prioritized throughout, with plastic used just about everywhere aside from the base and barrel. Specialized Air Tool Big Bore at Jenson USA for 49.99. Wood or metal would be nice at this price point, but I’d bet that placing the bleed valve on the head would be much more costly with either of those materials. Speaking of, the handle is plastic, with an ergonomic winged shape. This latest Air Tool MTB, like its predecessor, puts the bleed button right where your hands already are, on the top of the handle. Designed for Fat and Semi Fat tire bikes, the Air Tool Big Bore Pump packs massive volume-per-stroke, and it features a head that still works with winter. Bleed valves have also become standard issue for all except the most basic pumps, but far too many position the release valve on the head-not exactly the most convenient spot.
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