There are many components on mountain bikes. Mountain bike parts are different than regular bikes as they have more pieces and functions than a bike that is only used for light writing. The tires, front mountain bike forks, handlebars, and break sets are all different portions of the bike that are considered different.
Another portion of the bike that is considered unique is the gears said as mountain bikes have more gears and regular road bikes. Having more gears will entitle the writer to an easier climb when going up steep hills. Depending on the type of bike that you have, you can either shift with your wrist or shift using a rapid fire. Also, a mountain bike will either be equipped with a front and rear suspension. Depending on the type of bike that you get you can have either front or back suspension. Having both types of suspension will cost you more.
