The Bontrager Charger Floor Pump is a hard wearing & easy to use track pump for inflating all kinds of bike tyres. The steel construction & replaceable internals provide long-term durability while the large triangular base makes it stable on rough ground so you can use it car parks or on camp sites. The Auto-select head will automatically adjust to fit Presta & Schrader valves, no need to swap the internals. Features Steel construction & replaceable internals provide long-term durability Auto-select head fits Presta, Schrader, & Dunlop valves Large, stable base minimizes tipping Easy-to-read 4" base-mounted gauge