The Topeak JoeBlow(TM) Mountain floor pump features a massive barrel built to fill large-volume mountain bike tires quickly and accurately. Double-sided TwinHead(TM) works with Presta and Schrader valves; perfect for tube and tubeless mountain bike tires. Large, base-mounted analog gauge with psi and bar index is easy to read. Air release button makes fine-tuning tire pressure easy. Wide composite base provides stability, and oversize padded handles add comfort; painted steel barrel. Pump head keeper helps keep the mechanism clean and the extra-long hose in place for transport and storage. Handle lock keeps handle from extending while carrying. Ball and bladder needles are included and fit neatly in their own holder.