The xt m8000 double 3626 11 speed chainset from shimano is a high performance chainset from the classic mountainbike group using the most advanced 11 speed dyna sys chainrings this chainset will allow you to ride anywhere with 11 speed tuned gearing the power to choose how and where you ride the crank arms are forged hollowtech ii with unrivalled strength to weight ratio the lightweight construction teamed with an external super smooth bottom bracket help efficient cycling the steel inner