I would not replace my cog and chainring every time I replaced my chain. do you guys also light cigars with $100 bills or what? Just replace the chain frequently (I do it once it stretches to 1/16" per foot or so) and use cheap chains. It's almost always noisy when I put a new chain on my drivetrain but it quietens down within 300 km or so.
Jolson you might have borked your drivetrain by waiting too long to replace the chain. How much is the old chain stretched?
Also, a tight chain is very hard on everytihng in your drivetrain: chain, cog, ring, hub bearings and bb. Slack is your friend.
Last edited by mander; 03-16-08 at 08:10 AM.