Originally Posted by rekmeyata

CF is brittle, and a lot of people sell their CF bikes after a crash because they don't know if the frame was damaged or not, and unless you have the frame x-rayed there is no real reliable way to tell unless it actually cracked, the problem is most damage that happens occurs on the inside of the tube not the outside. It's a lot like an iceberg, what you see on the surface could look like a scratch but underneath the surface it could be fractured or delaminating. I would never buy a used CF bike, but that's not to say you can't get a good one, just saying the risk isn't worth it.

The next thing I'll hear is how you bought 1,000s of used CF bikes and never had an issue, and that may be true, but like I said there is a risk. I don't know about you, but when I am riding at 20 or coming down a steep grade, I'm not sure if I would want to find out that the bike was compromised before I bought it and it took a while for it rear its ugly head as I land on mine!