It's a pain to have two different pumps for road and trail. But now you don't have to worry about it. The Crank Brothers Power Pump Alloy bike pump features a compact design that lets you choose between presta or Schrader valves, so you'll only need one pump no matter where you go.
Dual piston single-stroke pump with settings for high volume or high pressure
Schrader and presta valve heads with no complicated hardware to choose between the two