Cyclocross was born in Europe at the beginning fo 20th century like a training for runners in winter time. Nowadays is an indipendent sport. The first race dates back to 1920 immediately with a large audience following.
It is essentially a road bike with few customizations to the frames for adapting to off roads. Equipped with drop bar handlebar and road wheels mounts cantilever or disk brakes for a more braking power. The front derailleur is higher from the ground than a normal bicycle to avoid obstacles and the front fork is wider to prevent the mud from blocking the wheels.