Big 4-inch gauge reads 1psi increments from 5-35 PSI for high-volume low-pressure tires (Gravel, MTB, and Fat bike applications).

5psi increments from 35-140 PSI. The 140PSI max pressure should be plenty for most rode bike tires.

Pump head has a built-in pressure release button to fine tune your air pressure without removing the pump head.