The RoadLink DM (Direct Mount) is the RoadLink designed to fit Shimano's current generation R8000 Ultegra and R9100 Dura-Ace rear derailleurs. It serves as a simple device to offset the position of the rear derailleur making it possible to run a wide-range mountain bike style cassette. It's an ideal solution for riders looking to convert their road gravel cyclocross or commuter.Fits Shimano R9100-generation Dura-Ace and R8000-generation Ultegra rear derailleursCNC machined from 6061-T6 aluminum with stainless steel boltDoes not change the derailleurs total chain wrap capacityFits standard derailleur hangers onlyBest used with Single or Double Setups - see manufacturer's site for more details