Sun's X3-AX features 3 wheels so you enjoy a go-cart feel and don't even have to put a foot down at stops. Plus, its light aluminum frame has plenty of get-up-and-go and handles like a dream, while the long wheelbase means a stable, predictable ride at even maximum speed. Complementing the great frame are 3 20-inch wheels with quality tires and dual rear disc brakes for total control. You'll also love the comfy, highly adjustable mesh seat and the easy ergonomic handlebar position. You get reliable Shimano, SRAM and Promax components for braking and shifting excellence too.