Got a odd one.


running 105 group set with a 34t rear cassette. Upgraded at a shop to that large cassette and a long arm rear derailure. Before this I was having some gremlins with this bike. Well it just will not for some reason stay "tuned" Had it to two separate shops both did tune ups, one replaced the cables but still I seem to get no more then 200-300 miles before I get some serious shifting and bind issues.

A little more data, bike is stored indoors, upright. Recently I discovered the rear derailleur hanger cracked. New hanger, another tune up and back is the bind and metal shavings sprinkled on the rear mech. This is now the second time for the shavings.

Is it possible the bike has an issue? Its a carbon bike, possible deformation in manufacturing?


Any ideas are appreciated.