In carbon and aluminium.
Bent derailleur hanger carbon frame.
Frame is a 2009 trek top fuel 9 8.
An alloy frame with a broken deralleur hanger was essentially ruined since a new dropout could not be simply brazed in.
So replaceable hangers are a very good thing.
The reason most non ferrous bicycles have replaceable derailleur hangers is because hangers can get bent or even broken simply from the bike falling over.
Since it s not recommended to try and straighten out the derailleur itself it means that you need to bend the derailleur hanger the way to fit with a bent derailleur.
What usually happens even a perfectly straight derailleur hanger won t fix things with a bent derailleur.
I have access to the park tool straightener but before i try to straighten it i wanted to check if its ok to put those forces on a carbon frame.
Find out how to straighten your bent mech hanger with this guide.
I think i may have a bent rear derailleur hanger.
Sometimes the derailleur gets bent a little as well.
Bent derailleur hanger if your rear derailleur is shifting poorly not staying in gear and appears to be bent or out of alignment check first whether the derailleur hanger is bent.
If the hanger was built into the frame and it was badly bent or broken it could mean having to replace the entire frame.
The derailleur hanger is the piece of metal that the rear derailleur attaches to near the rear axle.