The Topeak Joe Blow Mountain is the ideal pump for mountain bikes. In every aspect, this pump is specialised for the extremely precise inflation of an MTB outer tyre. The ideal tyre pressure Because the pressure gauge is extra sensitive and accurate made for MTB applications, you can determine the pressure of your tyres very precisely. Construction The Joe Blow Mountain has an extra high pump volume thanks to its very wide steel pump cylinder. This allows you to blow a lot of volume into the tyre per stroke, making it bulge in no time! The Joe Blow Mountain can pump up to 4 bar (60 psi). This is more than sufficient for almost all MTB tyres. The base and handle are made of a very strong composite, which makes the pump feel stable and durable.