Hi all. I have been told I have been told by my doc to lay off of running for awhile (heel spurs). He said I could ride a bike if I wanted, though. I bought a shiny mountain bike a couple of years ago, but I had not owned one since I was a kid, and had never owned one I needed to shift. Turns out i sucked at it, and kept throwing the chain. Can someone give me a little rudimentary instruction, some tips, or point me to a "cycling for dummies" kind of website? Thanks much. Blue Wanna kill these ads? We can help!