SRAM's premier X-range gearing, which utilizes tight jumps between chainrings and a 12-speed, wide range, 10-tooth start cassette, is now available for rival. This includes new cassettes that feature smooth, precise shifting in ranges that cover road, gravel and everything in between.Features:X-rangegearing gives you more range and a smoother gear progression, so youre always in the right gearNickel chrome plating for quiet and durabilityFull pin construction for durability and light weightDesigned to work with an XDRdriver bodySpeed (CS): 12sGearing: 10-30t, 10-36tCog finish (cassette): silverTechnology (cassette): XGCog sizes: 10-30t: 10, 11, 12, 13, 14, 15, 17, 19, 21, 24, 27, 30/10-36t: 10, 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 36Driver body interface: XDR