The best bike sharing program I've seen anywhere is in Copenhagen. http://ruk.ca/content/how-use-copenhagen-city-bikes/ http://ruk.ca/content/how-use-copenhage

The best bike sharing program I've seen anywhere is in Copenhagen. http://ruk.ca/content/how-use-copenhagen-city-bikes/ http://ruk.ca/content/how-use-copenhagen-city-bikes/ It's a free system, because the 20 kroner coin that is used to unlock the bike is released when the bike is returned. These bikes have 20-inch wheel, which are non-pneumatic. Single-gear with a coaster brake. And weigh about 50 pounds. Also built like tanks. As a tourist, it increased my enjoyment of the city by a factor of 10.