The Wolf Tooth RoadLink DM provides riders with the ability to convert their low-range rear derailleurs to be able to accept high-range cassettes. Features: Improves long-term shifting performance on wide-range one-by-ten drivetrains Increases chain wrap (69% for 40t, 53% for 42t), eliminates the need to drastically thread in the b-tension screw Replaces the Direct Mount link on 2013 or later Shimano 11-speed Shadow+ rear derailleurs to increase chain wrap and reduce premature shifting degradation Fits derailleurs with 8mm Direct Mount intermediate link that mounts to standard derailleur hangers. Direct Mount-native frames, SRAM rear derailleurs are not supported. Results may vary Installs in moments with little more than a 5mm Allen wrench Compatibility: Ultegra R8000 DuraAce R9100 Ultegra RX800 Ultegra RX805 105 R7000