Reuleaux Wheeled Bicycle

A Chinese man has successfully patented his new invention - a bicycle with odd-sided wheels. Guan Baihua, 50, a retired military officer in Qingdao, spent 18 months developing his unique bike.

The front wheel is a pentagonal curve of constant width while the back wheel is a reuleaux triangle (a triangular curve of constant width). Guan says the bike is mainly for fun but says riders could use it to lose weight as it takes more effort to pedal.

Here is a video of the bicycle in action. Click on the size button (to the right of the volume button) for a full screen view.