I have a Specialized HardRock for sale. I've installed Avid BB7 disc brakes on the bike (only the rear since the forks do not have disc mounts). The bike is a 21 speed (3 gears in the front, 7 in the back) The rear wheel is a 9 speed compatable wheel. Most parts are stock except grips, tires, gooseneck (stem), and bottom bracket.