Sram xg 1299 eagle 12 speed mtb cassettethe sram xg 1299 cassette is part of the top of the line xx1 range and the shining star of their 12 speed eagle system with its distinctive gold coloured ti nitride finish and contrasting black 50t bailout cog its finally time to say goodbye to that front derailleur for good as xx1s 10 50t sprockets give you the same gear range as most 2x drivetrains but at a much reduced weight this cassette is designed for use with srams race proven reliable xd dr