Bike build help! Is this shimano 105 r7000 derailleur correctly attached to this hanger? The B link thing is confusing (Bike frame is vintage racer frame from early 90s) More details in
Pack of 2 Wheels Manufacturing Derailleur Hanger 94 6061 Aluminum: Black | eBay
Derailleur hanger types? How to find it? What is dropout? - Elanus Parts
Derailleur Hanger No. 30 | CANYON BM
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Derailleur hanger types? How to find it? What is dropout? - Elanus Parts
Bike Maintenance: How to Replace a Derailleur Hanger - YouTube