Mountain bikes, commonly referred to as MTB or ATB (All Terrain Bicycles) are designed for riding on dirt trails and other unpaved conditions. There are several types of mountain bikes designed for a variety of aggressive riding styles. The most common type of mountain biking is referred to as cross country or XC mountain biking. This type of riding style typically involves a front suspension or full suspension with a lightweight frame design. Pedalcrunch.com is in the process of writing a "how-to" guide for mountain bike purchasing to aid you in a more fitting purchase for your riding needs. Stay tuned and ride hard!