Fits the CrossCurrent and CrossCurrent S. This is a slight upgrade to the Altus unit used on the CCS. 9 speed
The Shimano Alivio RD-M4000 SGS rear derailleur is designed for aggressive riding. With its super low profile and single-tension construction, it does not hit the chainstay in rough riding conditions. It's smooth and quiet, featuring Shadow Rd technology for less trouble.
