Description from the website:
This clock was made from a recycled aluminum bike wheel. The wheel mounts directly to the wall through the hub using a hollow wall anchor and gives the illusion that it is floating off the wall. The clock movement is a high torque German quartz movement and is attached to a set of rear cassette gears to conceal the movement. The movement is attached to the wheel by hanging it off of a screw coming out of the hub, and runs on 1 AA battery, included. This wheel measures roughly 22.5 inches in diameter and is fairly clean. Since these clocks are made from actual recycled bike wheels, condition and model may vary slightly, and their will be minor imperfections such as scuffing scratches etc. They did live another life before they were discarded. Handmade in the USA. It will make a great conversation piece on your wall or a special gift for that bike nut you know who is so hard to shop for.