Originally Posted by
dmagic17
Took it back to the shop today and had the mechanic and sales guy ride it. They both said that it performs as it should and didn't hear anything out of the ordinary. I was able to point it out to them a couple times while on the trainer but they didn't think BB. They said it would make more of a creak than the crack/pop sound.
Advice was to keep riding it until it is "broken in." I'll see what happens - If it continues to get worse I guess I'll take it to a different LBS to have it looked at.
I can hear it, but if it ain't chain rub, check to see the rear derailleur is set up properly. If the tension on the cable is wrong, there will be a sound that sounds similar to chain rub as the chain skips over the pulleys if the tension isn't set correctly.