The lezyne tech drive hv pump is a sculpted cnc machined high volume hand bike pump that39s designed to easily inflate your mountain bike tyres with fewer strokes the handle barrel and shaft are made of aluminum while the end caps are made of composite matrix for high strength this lezyne bike pump features an overlapping handle and barrel with oversized piston and shaft that are integrated into a compact design so you can carry it with you everywhere without it taking up extra ro