A mountain bike is a bicycle designed for off-road cycling on rough terrain, usually in mountainous areas. Its geometry, frame construction, and components are intended to withstand the rigors of this environment. Mountain bikes are often equipped with wide, knobby tires for increased stability and traction on rough surfaces; front and rear suspension to absorb shocks and bumps; and a low gear ratio for climbing steep hills.
Mountain bikes are used for a variety of purposes, including recreation, racing, and transportation. They are also popular with people who live in rural areas or who enjoy spending time outdoors. Mountain bikes can be ridden on a variety of surfaces, including dirt, gravel, sand, and snow.