Most of us will take far more from the Internet than we will ever give back. Sheldon Brown, however, managed to give far more than he could ever have taken. Sheldon passed away yesterday, apparently of a massive heart attack. He will be missed by an enormous number of people, most of whom have never met him. There isn’t a cyclist I know who hasn’t referred to Sheldon’s near encyclopedic site on all things bike for the answer to one mystery or another. Ride on, Sheldon. You will be missed.