The Motovox MBX10 and MBX11 mini bikes are made for the rough and tumble rider Should you find yourself in need of a rear wheel assembly, we have what you are looking for The Motovox MBX10 and MBX11 mini bikes are made for the rough and tumble rider. Should you find yourself in need of a rear wheel assembly, we have what you are looking for. This is the Motovox rear wheel assembly for the MBX10 and MBX11 mini bikes you need to get back to riding the rugged trails. Please note, due to changing supply from the manufacturer, you may receive either a black hub as pictured, or a natural silver hub. Once installed, neither color will be very noticeable.