Our 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-Range(TM) gearing gives you more range and a smoother gear progression, so you&&';;re always in the right gear Nickel chrome plating for quiet and durability FULL PIN construction for durability and light weight Designed to work with an XDR(TM) driver body Specifications Speed (CS) 12 Gearing 10-30t, 10-36t Cog finish (Cassette) Silver Technology (Cassette) XG Cog sizes 10-30t:10,11,12,13,14,15,17,19,21,24,27,30, 10-36t:10,11,12,13,15,17,19,21,24,28,32,36 Drivetrain Configuration 1x, 2x Cassette Size (Max) 30, 36 Cassette Size (Min) 10 Chain Technology Road Flattop D1, Road Flattop E1 Rear Derailleur Mount MTB, Road, Road L, UDH