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If youre running a dramatic 11-speed cassette with Shimano Durce or Ultegra rear derailleur, its best to upgrade the stock direct mount of the Wolf Tooth Roadlink DM. In this way, you can quickly flick the shift lever and maintain the stock level of chain wrap and crisp shift without feeling anything unstable when the chain moves up and down. Wolf Tooth, optimized the Roadlink DM to a wide range of 11-speed cassettes. Expand your gear range and boost your cycling field of vision than ever before, saving energy in difficult climbing.