Originally Posted by
Standard Issue
A ticking sount almost drove me mad while setting up one of my own bikes. After about 20 mins, I realized it was a little rubber nub from the tire slapping against the chain stay.
I've also encountered those molding nubs rubbing up against a brake pad. Since they are almost invisible while the wheel is spinning, you look at it and there does not appear to be anything rubbing, but you can hear it. Those nubs drove me nuts for a while.