Originally Posted by
Robertagol
When the carbon wears away, is that covered under the frame warranty?
It should be, if you're the original owner. Contact the shop where you bought it.
Originally Posted by
Robertagol
Is this common with Trek?
It happens. Is is common? Ask Trek. People will be all too happy to chime in with their bad experience and others will likewise be happy to relate what happened to a friend of a friend's cousin.