LEZYNE Micro Floor Drive High Pressure & High Volume Bike Pump - Portable Bicycle Tire Inflator for Road & Mountain Bikes - Perfect for Cycling, Commuting & Emergency Repairs

This pump is a great example of engineering done right. It is one of very few high-pressure mini pumps out there that can actually achieve the max pressure it's rated for with reasonable effort. The plunger rod is larger in diameter than most other mini pumps, rendering it more rigid and resistant to bending when bearing down on the handle with lots of force. The piston diameter is also smaller than most and the stroke length longer than most, making it easier to pump at high pressure while still moving fairly high volumes of air at lower pressures. The straight air chuck is a piece of knurled aluminium with an internal rubber O-ring that prevents air loss while threading onto your valve stem, and it is dual sided, fitting both Presta and Schrader valve stems. The air chuck is threaded and screws into the base of the pump for compact storage. There is also a minimalist plastic mounting bracket with a Velcro strap for secure storage on your bike. The pump comes with a plastic right-angle Dunlop valve air chuck attachment. It also comes with a steel sports ball inflator nozzle and a plastic pool float nozzle (the pump probably isn't the ideal tool for these larger volume, lower pressure inflatables).Here are the important measurements:Base: 2.5 cm x 5.9 cm (1.0 in x 2.3 in)Overall height: 30.7 cm (12.1 in)Piston diameter: 2.0 cm (0.8 in)Stroke length: 20.0 cm (7.9 in)Stroke volume: 62.8 cm^3 (3.8 in^3)Hose length: 60 cm (24 in)For the weight weenies out there, this pump weighs in at a scant 177 g (6.2 oz) bare, or 194 g (6.8 oz) with the included mounting bracket.