Everything you need to choose a mountain bike: the main types, wheel sizes, key components, how to pick your first bike and the gear and care that keep it running.
MTB is simply shorthand for mountain bike, but the moment you start shopping you discover it is not one thing at all. The term covers everything from light, fast cross-country machines to burly downhill rigs
A full suspension bike smooths out rough trails by springing both the front wheel and the rear, giving you more comfort, grip and control when the ground gets nasty.
A downhill bike is the most specialised machine in mountain biking: built to be pointed down steep, rough, high speed descents and almost nothing else.