Mountain Bike or Mountain Bike is a type of bicycle used in Mountain Biking, a sport of cycling in which the goal is to cross paths with various irregularities and obstacles. In some Latin countries the sport is called Mountain Biking and mountain biking (which stands for All Terrain Bike). Mountain Biking is a sport that involves strength, dexterity and self-sufficiency. As is common practice the sport in isolated locations, the aspect of self-sufficiency is important for the cyclist who can perform minor repairs on your bike. The sport mountain bike was born in California in mid-1950 through games of some cyclists and a few surfers who sought challenges quite different from traditional road competitions and activities for days without waves. The first names that appeared were: James Finley Scott, "probably" the first person to modify a bike to ride solely on the ground - in 1953. We used to ride a Schwinn frame, wide tires, known as balloon, straight handlebars, brakes and derailleurs cantilever front and rear, Tom Ritchey and Gary Fisher, pioneers in sport and the development of components in series, such as bike fit for the future new style. Founders of companies Ritchey and Gary Fisher, Joe Breeze, make the first bicycle to practice mountain bike, the Breezer # 1 in October 1977. . . From the mechanical point of view of the schwinn derailleur does not differ that much from the rear schwinn derailleur though its shape is completely different. The operation is always based on a parallelogram defoma driven by a braided steel cable. The chain, in this case, it runs on wheels, but in a guide that provides to move from one gear to another. Also the different type of coupling on the steering column. The classical solution that provides support to weld on the frame you are going to increasingly replace the mounting strap. This solution does not require any support on the frame and preferred in the pipes that take advantage of ultra-thin super-light in which a weld could create problems and would not provide the required structural strength needed to withstand the action of shifting. .