Tanpan allows the usage of Shimano Road Shifters with Shimano Dynasys rear derailleurs. Built to translate the differing cable pulls between the two systems, Tanpan allows for wider gear range, more gear options and better chain security with clutch derailleurs for road or gravel drivetrains.Designed to be used with Shimano 11-speed Dynasys Rear Derailleurs and Shimano 11-Speed Road ShiftersNot Compatible with Tiagra 4700Compatible with most road, CX and gravel bikesDesigned to mount directly to adjuster-free cable stops on Shimano rear derailleursCertain chainring and cassette configurations benefit from a GoatlinkIf 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