It's tough to go wrong with the original, and SKS' Airboy XL takes everything you love about Airboy and makes it high-volume specific. The 2-chamber/2-plunger pumping system provides plenty of efficiency, especially considering its tiny size! This high volume pump gets your larger tires up to 75 psi, regardless of whether you're running Presta or Schrader valves. The Airboy XL tackles whatever you're running with surprising toughness and quickness.