Bikes and trains are a great mix. A train can get you out into the coutryside for some downhill runs, or let you cycle at a destination too far to get to by bike in a day, saving a car trip. Our own velvet-voiced editor Dylan Tweney throws his taxi-yellow, easy to carry fixed-gear on the commuter train from time to time, and I would travel along with my non-biking friends in Berlin on the bike-friendly U-bahn. But while San Francisco and Berlin both allow bikes (although I hear the new muni cars have less bike spaces than the old ones), neither is as impressive as the the Stuttgart to Degerloch Zahnradbahn in Germany. The open bike-car has taken bike-commuters along this short two kilometer (one and a quarter mile) stretch since 1983. Two kilometers? Are these people lazy? Our German speaking readers will have noticed what is going on here: Zahnradbahn is a cog-driven railway, and this train climbs 200 meters (almost 2,200 yards) from station to station, a cl...