What is Mountain Bike Dirt Jump (DJ) ?

Mountain Bike Dirt Jump (DJ) is one branch of mountain bikes. Dirt Jump (DJ) is usually reserved for the biker who likes to extreme activities such as jumping or slalom. Some people consider this bike is a great version of BMX with front suspension. The bike is designed to withstand the load when jumping.
Form of frames (DJ) are usually solid and memorable style, but rather heavy for uphill path. (DJ) for Cross Country, usually combined with a softening solution constituent components such as forks, wheels or crank.