Originally Posted by
telebianchi
OK. A quick google found a column from Lennard Zinn in VeloNews regarding carbon fork life. It includes feedback from several carbon fork manufacturers. The bottom line: a carbon fork, assuming it wasn't crashed or otherwise damaged, will last just fine and doesn't need a timed replacement.
Technical FAQ with Lennard Zinn: Carbon Forks - VeloNews.com
With one exception Zinn's respondents did not consider degradation if the composite due to chemical changes over time. One should not be unduly concerned about this, but it is a failure mode that needs to be recognized. Once again, it is all about inspection.