Originally Posted by timcupery
Sheldon Brown issues a warning on his
Fixed Gear Bicycles for the Road page, about the danger of wrenching on fixed-gear bicycles where the chain and gears will turn if the rear wheel turns. He's got a couple of gruesome pictures:

I believ the bottom pics are bostontrevor....I could be wrong, but I know its just about that bad
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I've been here since 2004? I've never felt this old before.