Amazon.com: M8 Chainring Derailleur Hanger Bolt Long Version Set of 2 M8 x 12 Fasteners Compatible with Specific GT Specialized Dropouts : Industrial & Scientific
How to Install/Replace a Derailleur Hanger | REI Co-op
Stripped new Shimano rear derailleur hanger bolt…it's snug in there but I want to know if I can replace it so I can maintain it in the future. Or am I out
Shimano Ultegra Di2 Rear Derailleur for Bike - Black for sale online | eBay