Bicycles can be used as an environmentally friendly means of transportation for walking and traveling; More and more people use bicycles as fitness equipment to exercise and travel by bike; Cycling itself is also a competitive sport, including road cycling, mountain cycling, field cycling, stunt cycling, etc.

Mountain bike, also called all-terrain bike, is abbreviated as MTB and ATB. It is a bicycle for mountain, dirt road and non-human environment. It was developed in the United States in the early 1980s. It is a bicycle specially designed for cross-country (hills, trails, fields and sandy gravel roads) walking. Its main features are: wide tires, straight handle, front and rear shock absorption, and comfortable riding. Wide and multi-tooth tires provide grip and shock absorbers absorb impact. In recent years, the application of front shock absorption has become the standard, and vehicles with front and rear shock absorption have become more and more popular. Some mountain bikes began to use auxiliary handlebars, but the handlebars with upward angle became fashionable.