SRAM Rival AXS XG-1250 Cassette - 12-Speed, 10-30t, Silver, For XDR Driver Body, D1The SRAM Rival XG 1250 Cassette offers smooth, precise shifting in ranges that cover road, gravel and everything in between. SRAM brings their premier 12 speed drivetrain features such as a wide range, X Range gearing technology, and a 10 tooth start to the Rival component group. X Range 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