Cycling aficionados mourn the passing of Sheldon Brown. I never met the man, but I am very familiar with his website and his cycling tips and techniques. His online gear calculator helped me understand the mystery of my road bikes gears as I went from an 11-21 to a 12-25 to a 12-25 compact crankset. Without him, I would be huffing, puffing, and pushing my bike up the Low-Key Hillclimbs.
Rest in Peace, Sheldon. You’ll be missed.