crack in half
I've read a few company brochures that had a disclaimer regarding their carbon fiber products....specifically, that if you are over 250 pounds they don't reccomend you use them. While I'm sure Trek builds a fine frame, its not really suitable for wide tires or fenders, for that matter. Something I appreciate on a all around bike. I don't like flatting and I don't like all that wet, gritty, sludge going on my backside or into my drivetrain.
One problem CF suffers from is it doesn't handle scratching, gaffs, wrecks or other types of damage without invisable damage occuring. This is warned about in some product manuals. If you ride a CF bike or fork, keep an eye on it, if it gets nicked, scratched or wacked hard. Hidden micro cracking can lead to sudden failures without warning.