Designed for Fat and Semi Fat tire bikes, the Specialized Air Tool Big Bore Pump packs massive volume-per-stroke, and it features a head that still works with winter gloves on to make it perfect for backcountry winter fat biking.

• Oversized press-on Schrader and Presta head won’t accidentally remove valve cores and can be easily used with thick gloves.
• Flexible hose attachment allows for aggressive pumping without fear of damaging valve stems.
• Inverted barrel design allows for high volume in a compact size.
• Coarse machined aluminum barrel for extra grip.
• Water bottle boss mount with elastomer band included.
• Max pressure: 50 PSI (3.5bar)
• Volume-per-stroke: 90cc