Originally Posted by
Scrodzilla
I find the black Soma cogs to be the second quietest I've ever used (the quietest is an EAI Superstar). Angie's S300s with a K710SL chain and Soma cog is ridiculously silent. Brand new drivetrain stuff is always a little louder than when it wears in a little.
More riding, less worrying.
+1
A new drivetrain will be noisy until you break it in. This is normal.
And, yes, the K710 and K710SL chains are really quiet. It's the quietest chain that I've ever used...including the Izumi ECO and V Super Toughness.