Originally Posted by
Xgecko
not in the last 25 years anyway.....1/8" chain on a 3/32" cog moves around, to me it feels weird and to be honest I don't like the feeling
Its either in your head, or something else is wrong (such as a worn-out chain, cog, or f'ed up chainline). All else being equal, you absolutely cannot "feel" the difference between a 3/32" and 1/8" cog.