Larger barrel version pumps more air volume for MTB riders. Large integrated 1-1/8" diameter easy-to-read analog gauge provides the perfect inflation every time. Dual-Action (DA) doubles volume with each stroke and inflates tires up to pressure fast. Integrated dust cap keeps pump head clean and thumb lock lever insures air-tight seal.HEADPresta / Schrader / Dunlop with integrated dust capBARRELAluminumTHUMB LOCK / HANDLEPolymerCAPACITY60 psi / 4 bar, 1-1/8" AnalogVOLUME PER STROKE82 cc (pull + push)ADDED FEATURESDual action pumping head Side mount bracketSIZE22.3 x 4.6 x 3.4 cm / 8.8" x 1.8" x 1.3"WEIGHT152 g / 5.36 oz