This mini pump is made to inflate tires and forks, which is not clear in the description. The range of measurement manometer is 300psi (20 bar). Measuring the tire pressure (about 2 bar) is very nearly impossible, movement of the needle to about 2 minutes (1/10 scale). At this pump is the manufacturer with lower pressure ranges that would be best suited for mountain bikes. It must specify the measurement range in the description. Meaning "HI V" and "HI P" also specify. Apart from these comments, the pump is a beautiful product