With the M8000, Shimano has completely renewed its outstanding XT group and, as with the XTR, relies on an 11-speed drivetrain that scores with an incredibly wide range of applications. The teeth of the 2-speed chainrings are equipped with Shimano’s new Dynamic Chain Engagement (DCE) technology and ensure optimum chain guidance – both in terms of guidance during crank rotation and in terms of chain retention on the chainring in rough terrain. The danger of a chain jumping is thus further minimised. Material: Aluminum / glass fiber reinforced plastic Additional Information: – 34 teeth (BB) / 36 teeth (BC) / 38 teeth (BD) Operating Range: MTB Compatibility: 11-speed Shifting Components Front derailleurs: 2-speed Rear shifters: 11-speed Chainrings Number of Holes: 4-Screws