SSR Motorsports SX-50 Pit Bike Black Pocket Bike Size CARB Approved for California, Red Sticker2-Stroke Pocket Bike, 10" wheels, 33" wheelbase, seat height 23", only 48 pounds. 50cc, 2-Stroke, Speed Limiter, Automatic Transmission, Dual Disc Brakes. adults can ride this if not too big Pocket Bikes are mechanically intensive to Setup, Operate and Maintain. Parts available on website. NO WARRANTY. ALL SALES FINAL, NO RETURNS.