M403 (Front) Race proven front motocross tyre designed for intermediate terrain. Derived from top factory SX / MX and off-road racing technologies. M404 (Rear) Race proven rear motocross tyre designed for intermediate terrain. Derived from top factory SX / MX and off-road racing technologies. Race proven front motocross tyre designed for intermediate terrain. Derived from top factory SX / MX and off-road racing technologies.