Lindarets x Wolf Tooth Tanpan SH10 - Use Mountain Rear Derailleur with Road Shifters - 10 Speed Certain chainring and cassette configurations benefit from a Goatlink If the rear derailleur cable is routed internally through the chainstay and exits at the end of the chainstay above the axle or past the axle out the very end, you will need to utilize the inline ferrule Compatible with most road, CX and gravel bikes Designed to mount directly to adjuster-free cable stops on Shimano rear derailleurs Designed to be used with Shimano 10-speed Dynasys Rear Derailleurs and Shimano 10-speed Road Shifters