Bontrager Air Support MTB
Bontrager's Air Support MTB is a life-saver when you flat out on the trail. It has an easy-to-use thumblock, auto-selecting head that fits Presta and Schrader valves, plus a fold-out T handle and a dual action to inflate fat tires quickly. The Air Support is compact and light and it comes with a mount so you can carry it on your frame.
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This pump has been tested a handful of times due to some pinched tubes. The dual pump action is deceptive as it will inflate a tube quickly with it high capacity chamber. Also, when getting towards 35-40 pounds of pressure, this pump doesn't struggle to get the job done. I highly recommend this pump.