When I'm pedalling normally, I can't hear it. When I am standing up and rocking the bike back and forth while pedalling, I hear a "clicking" sound coming from either the crank or bottom bracket. I know its not the pedals, because I got some new Primos a week ago and it still makes the noise. The Bottom Bracket is a Truvativ ISIS Sealed Cartridge, with the Truvativ Hussefelt cranks. Any suggestions on what to do, or should I just buy a new bottom bracket?