The Origin8 Airaid Maxi Plus is a dual-mode floor pump that switches between high pressure and high volume. Its oversize 4" analog dual-scale gauge reads 0 to 35PSI for MTB and fat bikes and 35 to 140PSI for road and all-road bikes.A 27" steel barrel and base give it a durable, stable platform, and the EZ-Touch smart pump head switches automatically between Presta and Schrader valves. It has a 1120mm full-length hose, and the handle end caps conceal a ball needle and plastic valve adapter.