The Wolf Tooth GoatLink 11 Speed Derailleur Hanger Extension offsets the position of your 11-speed Shimano rear derailleur, improving long-term shifting performance and making it possible to run larger range cassettes in an optimal position. If you’re looking to climb the steepest climbs on a 1x set up, this is a hassle-free way to do so. The Wolf Tooth GoatLink grew out of a desire within Wolf Tooth's team to run 11-speed Shimano derailleurs and shifters with SRAM 10-42t XD cassettes without compromising shifting performance.When used with a 10-42t cassette, the Wolf Tooth GoatLink 11 re-positions SLX M7000, XT M8000 and XTR M9000 rear derailleurs such that free chain length between the cassette and the top derailleur pulley is within 1% of what Shimano intended while cassette tooth engagement in the smallest cog is improved by 27%.Wolf Tooth GoatLink 11 Speed Derailleur Hanger Extension FeaturesThe GoatLink 11 is compatible with SLX M700, XT M8000 and XTR M9000 series 11-speed Shimano rear derailleurs.The GoatLink 11 mounts only to standard derailleur hangers.Double chainrings (2x) is supported and requires a long cage (SGS) rear derailleur with no more than a 12t difference in front chainrings (with an 11-46t cassette).Triple chainrings are not supported.Direct Mount native frames and SRAM derailleurs are not supported.Due to variations in derailleur hanger geometry, chainstay length, chainring size, B-screw adjustment, and suspension configuration, individual results will vary slightly.