I just bought a 21-speed hybrid bike (Wal-Mart grade Schwinn) and to try to customize/simplify things (other bike is a fixie road bike), I removed the front deraileur and bought a new single-speed front crank (Origin-8 Track/SS Crank) from my LBS. By local I mean 1hr away.
Got home, did the swap, and put the chain back on, and it doesn't fit on the chainring correctly. I measured my chain and the links are the standard 1/2", but it seems like the teeth in the sprocket are slightly longer than that; eventually as the chain goes around the ring, the rollers come out of the "valley" between teeth and a roller ends up on the tip of a tooth. (Photos below)
The shop is closed for the weekend and it's driving me crazy trying to find an answer. From my understanding, all bike chains have a standard 1/2" link length, it's just the width that varies. Anyone have any ideas?