http://sheldonbrown.com/ - Sheldon Brown (July 14, 1944 – February 4, 2008) is a bike god if ever there were one. When I (leeman) first started living on bikes, I was spending every spare minute consuming all of the information I could about them, and almost every problem I researched on the internet eventually led me to his page. If you're new to bikes, or you plan on growing old with them, get familiar with his site. It's rumored that cyclists around the world got a flat tire on the day he died.