The Genesis 29" Silverton Men's Mountain Bike is a 21-speed hard tail mountain bike that comes in a really cool dark green color with silver accents. This aluminum frame mountain bike comes with a Shimano rear derailleur, traditional pedals, a quick release seat-post, front disc brakes, and rear linear-pull brakes. This is a simple and classic-looking mountain bike in a 29" size which is typically good for men who are 6 ft tall or greater.