Various Footage of Dirt Bikes; Dirt Bike Jumps, Motocross, Rock Climbing, Hill Climbing, Extreme Riding. There are several different types of off-road motorcycles, also known as ‘dirt bikes’, designed and specialised for off-road events. For off-road use they typically have, when compared to road going motorcycles, light weight, long suspension travel and high ground clearance, simple, rugged construction with little bodywork and no fairing for easy recovery after spills, and large wheels with knobby tires, often clamped to the rim with a rim lock.