• Our High Volume Boundary 2.0HV pump is designed for mountain bikers who need larger delivery of air for big tyres. An extendable head means it's easier to pump and the sealing lever doubles as a protective cover to keep it functioning no matter the conditions under tire. The frame bracket has been optimized for recessed frame down tube. 

High Volume construction optimized for mountain bikes
Innovative sealing lever doubles as protective head cover protecting against water and dirt
Extractable head reduces the risk of damaging valve stem during inflation
Frame bracket optimized for Recessed frame down tube