Mountain bikes are made to ride off-road for adventure, fun, and competition. They’re characterized by wide, knobby tires for increased traction on variable terrain, but there is a great deal of variation between models. Hardtail or full suspension? 29er or 27.5”? Aluminum or carbon? From suspension to frame design, finding the bike that’s right for you depends on where you’ll ride and the type of riding you want to do.