Shimano Officially Introduces Direct Mount Rear Derailleurs - Pinkbike
There's a flood of Direct Mount derailleur hangers at the Tour de France — but why? - CyclingTips
shimano - Direct mount vs. hanger derailleur - Bicycles Stack Exchange
Derailleur hanger types? How to find it? What is dropout? - Elanus Parts
Direct Mount Derailleur Hanger for Turner Frames - A.S. Solutions
Direct Mount Derailleur Hanger Shimano Trek Specialized Giant Canyon Cannondale | eBay
Amazon.com : Inkesky 7/8/9 Speed Bike Rear Derailleur - Direct Mount(NOT Hanger Mount) - Long Cage(SGS) - Compatible with Shimano for Mountain Bike, MTB Cycling : Sports & Outdoors
XTR M980 Rear Derailleur usable on direct mount frame? | Mountain Bike Reviews Forum