4X (Mountain Cross, 4X racing): This is a new style of riding
Four riders in the ups and downs of racing games
It is similar to BMX Dirt actually speed crossing the finish line first wins the game, but it looks more like a cross-country motorcycle race
These vehicles may be have 3-4 inches after the shock of full suspension vehicle, it may be hard tail without damping of the vehicle.
And the frame is very strong. Anterior disk has the chain guide. Prevent the chain off. Fork more relaxed, in order to meet exciting race and prance
Fork shorter rear frame, a lower axial position, is to better handling and acceleration landing.