A bicycle suspension system is used to protect the rider from rough terrains. Bicycle suspension is used primarily on mountain bikes, but is also common on hybrid bicycles. Bicycling is the seventh most popular entertaining activity in the U.S. Approximately 39 million individuals rode bicycles in the U.S. In 2011 individuals that defined themselves as frequent or infrequent bicycle riders counted for 22.9 million of this group. The bicycling industry made 6 billion USD in income and over 12.8 million bicycles were sold in the U.S. Around 3 billion USD was spent on aftermarket shares and accessories purchased at bike domain shops and trade markets. Bicycle suspension can be affixed on different parts of the bicycle, such as rear suspension, suspension seat post, front suspension, suspension saddle, suspension hub, and suspension stem. Bicycles with single forward-facing suspension are classified as hard tail and bicycles with suspension in both the rear and front are classified as f...