The XD driver is for Sram's 10-42 11-speed and 10-50/52 12-speed mtn. bike cassettes. The newer XDR driver is for Sram's 12-speed road cassettes that start with a 10t small cog. Everything else, generally speaking, will most likely use the Shimano cassette body, and start with an 11t or 12t small cog. Many of the 10 and 11-speed Sram and Shimano cassettes that use the Shimano cassette body are interchangeable. My V has a Shimano Dura Ace 11-speed drivetrain, except for the chain and cassette, which are Sram Red. They work great together.