SRAM X01 Eagle XG-1295 Cassette - 12 Speed, 10-52t, 520% Range, Black, For XD Driver BodyThe SRAM XG 1295 Eagle cassette gives riders more than ever before, with an unprecedented range and gives stronger riders the option to increase chainring size. Fits the same XD drivers that are used for SRAM 10 42 11 speed cassettes Largest cog is aluminum Tooth profiles provide better up and down shifting and improve chain retention Titanium Nitride surface treatment reduces friction and enhances wear The XG 1295 Eagle cassette meets durability