"Nothing Lasts Forever"
Cannondale has never seen a 1972 Campagnolo Record rear derailleur, obviously!
"...continued use is hazardous."
So is exposure to my attorneys. So...'who' gets to determine exactly when a frame becomes "hazardous"? I have to agree that a heck of a lot of these new frames (and some of the components) are a law suit waiting to happen.
I can hear the judge now..."So, the manufacturer claims his product is intended for high performance and the defendant was ...riding it like he stole it when it asploded? Judgement of $2.4 million dollars with treble damages to the plaintiff!"
Quote by dhk2:
"For example, all aspects of use being identical, a lightweight Super Six, System Six, CAAD7 or CAAD8 frame will have a shorter life than a heavier CAAD3 frame."
True. But all things not being equal, a fred can probably ride the 750 gram climber's special for several decades of mega-miles with no fear of his frame coming unglued, de-laminating, outgassing, UV deterioration or popping apart at the seams. A Cat 2 might also ride that same frame until it's three generations obsolete and retired without failure while the next powerless Joe has his come apart in less than a year...like mine. And mine was no climbing wonder. There is no logic to the failures in most cases as far as I've observed.
There is local Trek dealer that has quite a nice collection of cut-up, cracked Madones in the back room. Cheaper to replace 100 Madones, including rebuilds, than going to court one time. A friend of my is riding a warranty replacement Tarmac. His original Spesh cracked and they comp'ed him upmarket to the Tarmac. Well, his nice Tarmac has a crack at the bottom of the seat stay. It will be interesting to see if Spesh...king of the 'Ill sue!' manufacturers...will comp him another frame.
All we can do is to buy from reputable manufacturers, keep a vigilant eye out and a good lawyer's card in your wallet.