Originally Posted by
mattm
Took my bike into the shop; turns out the derailleur hanger was bent.. no wonder I could never get the derailleur adjusted quite right!
May or may not explain the mystery chain drop, but it can't be any worse.. (I hope)
Mechanic joked that people are usually either a good mechanic or a good bike racer, and that I must be a decent bike racer.
So you are decent at both?
some hangars are pretty soft. I travel with a few extra. Modern top end groups are so good that if you can't get shifting perfect really quickly there is a decent shot it is the hangar.
Abbey makes yes an awesome alignment gauge if you are ever interested.