Almost every day at Instructables.com — “the world’s biggest show and tell”– there’s someone with a new hack on the bicycle, from the snow-bike to the DIY carbon frame (I mentioned this last week) to the torchless tallbike.

Today, I noticed this bike built with two headtubes so that the wheels can be steered independently. Not necessarily something you want to take out on a bar cruise, but good for a few laughs out in the alley. (Incidentally, not a bike I’d want to be clipped in to, as this gentleman is prepared to do.)

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Still, I can’t help saying: All this human ingenuity, and no one has actually improved on the simple perfection of the traditional safety bike.