SUNRACE CSMX80 11-SPEED CASSETTEGet dependable shifts and wide gear ratio from the Sunrace CSMX80 11-Speed Cassette. The CSMX80 features an alloy spider, spacers, lockring and 2 largest to help save weight. The massive 11-50t gear range lets spin your way up the steepest climbs and mash along the straights and downhills. Only compatible w/ Shimano 11-speed Derailleurs: SLX (RD-M7000 11 SGS); XT (RG-M8000 SGS) and XTRRD-M9000 SGS)Features7075 Alloy Largest 2 Sprocket Alloy Spiders, Lockring & Spacers11-50t512g | Sunrace | Csmx80 11 Speed Cassette | Black | 11-50T, 11 Speed Shimano/sram