Mountain Bike  originated in 1977 in San Francisco. Design
Riding in the mountains of vehicles, typically have a transmission switchable effort stalls or fast, some shock absorbers will be installed in the chassis, tire leather chocolate tread portion so as to face in the absence of paved bicycle road riding . Mountain bike parts size is generally imperial units. 24/26/29 inch rims for the tire size is generally 1.0 to 2.5 inches. Frame size is in imperial units, such as 14 ", 17", 19 "to indicate the size of the frame size. Details divided into many categories, we often generally xc class. Variable speed, tire grip is good for rough off-road, there is damping system to reduce the bumps. strong overall strength of greater impact resistance when compared to conventional bicycle riding more difficult to damage the strong.