The Prevelo Zulu Four is a 24-inch kids' mountain bike and the step up from the 20-inch Zulu Three, and a Bike Rumor Editor's Choice. Tuned for riders ages 8 to 11 at just 22 pounds, it climbs and descends with real precision thanks to a 100mm RST First air fork with lockout and adjustable rebound, thru-axle, hydraulic disc brakes, and a wide-range 10-speed Microshift Advent X drivetrain. High-performance components engineered around a young rider's proportions. Fits inseams 23 to 29 inches.