The Topeak JoeBlow Fat Floor Pump is the first floor pump designed specifically to accommodate fat tire needs. With a huge barrel measuring 1. 5 times bigger than regular floor pumps, the JoeBlow Fat pushes more air and will get you pumped up and out in the snow faster than your standard pencil-neck floor pump. The JoeBlow Fat's TwinHead with air release button is compatible with Presta, Schrader, or Dunlop valves and lets you adjust the air volume in small increments for the perfect pressure. The JoeBlow Fat also features a fat tire-specific maximum pressure of 30 psi for wider psi increment spacing on the gauge and precise inflation measurements.