Jim Milsteinwrote a review of Lezyne Alloy Drive High Volume Pump on July 26, 2018
Familiarity: I've used it several times
The Lezyne Alloy Drive M replaces my old zefal mtb pump. Its design is much better, and I think that's true for its all alu construction too. It weighs one gram less at 135g and is a little shorter; so, basically the same dimensions. But it pumps more air with a shorter stroke and is far easier to use due to the short rubber hose with both presta and schrader fittings built in and ready to go. On my tubeless 27.5" x 2.8" tires ten strokes yields about one psi. Probably a bit more with a tube taking up space. I run my tires at 15-17psi for better traction and ride, and that suggests I could get a tire pumped up from zero to ride-worthy well before dark. Who rides rough trails in the dark? Not me.
UPDATE: This pump is so pleasant to use, I top up my tires at the trailhead with it. The stated length of the pump is correct for the metal body. If you are millimeter-minded, add another 9mm for the protruding rubber seals and a bit of the stashed hose. Storing the hose inside the piston rod is very clever. Another clever design feature is the loose O-ring above the piston, which keeps the pump from clattering on the up-stroke.