Bottom line up front: After airing down on rocky trails in Utah, sand in the Pine Barrens, and muddy fire roads in PA, I keep coming back to the ARB Twin Motor Portable Air Compressor as my top pick. It fills a 35-inch tire from 15 PSI to 35 PSI in about 4 minutes flat, the duty cycle is generous, and it has survived three years of abuse in my rig without a hiccup. Top Pick After comparing the field, this is the one I’d spend my own money on. ARB Twin Motor Portable Air Compressor Check Pr