FamilyGoKarts Boulder 400XR Kids ATV in Black Its low 25 inch seat height and stable 31.5 inch wheelbase make the Boulder 400XR the perfect size for kids just starting to ride. A rugged steel frame and full suspension combined with all-terrain tires make this bike ready for the toughest trails. Max Torque: 6.5N.m/5000-5500r/min; Battery: 12V/4Ah; Front Hand Brake: Drum; Rear Foot Brake: Hydraulic Disc; Fuel Capacity: 2.3 Liters It is equipped with several safety features to keep parents in control including a speed limiter and remote control with engine shut-off. This ATV has a dependable air-cooled, single cylinder, 4-stroke engine for ease of maintenance, convenient electric start and a smooth, easy to handle automatic transmission.