I have a seven year old bike with no-name Carbon Fiber fork and Seat Stays. Lately, I've noticed (By tapping on it.) the sound doesn't seem right. On newer bikes, the sound is solid but on this one, it isn't. We are planning to get rid of it before something happens. This may be a knee-jerk reaction but the last thing you want (on a ride) is your bike to break in half. Carbon Fiber maybe great in some things but on a bicycle...I worry, a lot.