Specialized Air Tool Big Bore Pump The last thing you want to have happen while you're out on the trails or in the backcountry is to have a flat tire. With the trustworthy Air Tool Big Bore pump and its included water bottle boss mount you'll never be left unprepared. Its oversized press-on Schrader and Presta head has been designed to prevent accidental valve core removal. The flexible hose attachment reduces the chance of accidentally damaging the valve while aggressively pumping. A coarse machined aluminum barrel allows you to use the pump with gloves on, making it a great pick for fat biking or mountain biking in colder temperatures. Features Overside press-on Schrader and Presta headwon't accidentally remove valve cores Flexible hose reduces the chances of damaging your valves Coarse machined aluminum barrel offers increased grip Included water bottle boss mount for on the go frame storage Max pressure: 50 PSI makes this pump ideal for mountain bikes, plus tire bikes, and fat bikes Volume-per-stroke Specifications Connection Press-on, Presta and Schrader Max Pressure3. 5 bar / 50 psi Barrel Material Aluminum Gauge No Intended Use Mountain Bike, Plus Mountain Bike, Fat Bike | Specialized | Air Tool Big Bore Pump Black