Blackburn Mammoth 2Stage Compact Pump (Silver)

These are great pumps for filling tires fast and efficiently. Clamp pretty solidly onto Presta valves with minimal slip if not held by the filling head and quickly inflate road bike tires, or even mountain tires.

The one main disadvantage these have is their thickness, which prevents them from being mounted on the vertical frame tube of a road bike, where I prefer my pumps to sit, at least not without the crank arms smacking into them. But they'll mount to the downtube cage holes fine, or fit in a medium to large saddle bag.

One of these proved invaluable to have on a recent 45mi road bike ride on a hot, humid day, when my tubeless Maxxis tire picked up a roofing staple and deflated. I was able to pump up a tube in less than a minute, after sealant and plugs failed to allow the tire to reinflate again tubeless, even with a CO2 cartridge.

One other small disadvantage - the rubber ties that hold the pump to the mount come off exceedingly easy and are therefore lost much too quickly. Lost one of the two when I forgot to snug them down after I stuffed the pump into my saddle bag before the flat.