Check the listing for details. microSHIFT Acolyte RD-M5180M-B 8-Speed Rear Derailleur, Medium Cage, Black for. Color: Black, Condition: New. Listed at 27.94 USD. Not everyone needs the added chain retention provided by our innovative SpringLock system. For those riders, microSHIFT offers a non-clutch version of their Acolyte derailleur. While still capable of handling a 12-46t cassette, the rear derailleur is the perfect choice for commuter or touring bikes that can benefit from using a wide range 1x gearing system.Upgraded cage design provides improved chain wrap and retention. Direct path cable routing for smooth and responsive shifting. In addition to 8-Speed cassettes, this rear derailleur is also compatible with 12-42t and 12-46t 9-speed cassettes (requires Advent 9-speed shifter). Compatible with Acolyte 8-speed or Advent 9-speed shifters only. Item Specifications: Rear Der/Shifter Compatibility, microSHIFT Acolyte, Rear Der/Shifter.