microSHIFT Acolyte Rear Derailleur - 8 Speed, Medium Cage, BlackNot everyone needs the added chain retention provided by our innovative SpringLock system. For those riders, we offer a non clutch version of our 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. Direct path cable routing for smooth and responsive shifting Compatible with 12 42T and 12 46T 9 speed