The Prevelo Zulu Three is a 20-inch kids' mountain bike and the step up from the 16-inch Zulu Two, and a Bike Rumor Best of Show winner. Built at just 20.5 pounds for riders ages 5½ to 9, it's equipped like a serious mountain bike: an 80mm RST First air fork with lockout and thru-axle, hydraulic disc brakes, and a 9-speed Microshift Advent clutch drivetrain that stays quiet and precise over rough ground. Light enough to learn on, capable enough to progress fast. Fits inseams 20 to 26 inches.