Originally Posted by THSdrummer

It sounds like chain rub, but there is no chain rub. It definitely doesn't sound like a creaky door, so that's good.

Hmm, much appreciation! To be honest, I have no clue if it's a BB30 or adapted. This bike is completely stock from when I bought it, 2012 CAAD10 3. I haven't played with anything, at least not yet.