Automatic Bicycle Transmission

Trek Bikes, along with a couple of other manufacturers, has released bicycles featuring Shimano's new automatic shifting transmission. Called the Shimano Coasting, this three-speed transmission auto-shifts gears as you ride.

Obviously, three gears limits the bicycle to "around-town" riding but none the less, the actual production of an automatic transmission bicycle is a major milestone. Trek calls their bicycle using this technology the Lime*; a rather hideous looking machine in my opinion.

Image courtesy of trekbikes.com

*external link to trekbikes.com