Shimano XT M771 10-Speed 16t 4th position Cassette Cog Review Posted by GiantPandaisy May 30, 2018 in Drivetrain Components This fits your . Make sure this fits by entering your model number. Shimano XT CS-M771 10-Speed Cassette Cogs Shimano XT CS-M771 10-Speed Cassette Cogs Cycling Outdoor Recreation Parts & Components SHIMANO Sports & Outdoors