SRAM XX1 Eagle Crankset 12 Speed 170mm 34T Direct Mount GXP Boost color gold type of riding and individual type of riding and individual rider preferences BR RX400 disc caliper features Shimano ICE Technology for excellent heat dissipation Convenient tool access and One Way Bleed system mean set up and maintenance are simple Bontrager Paradigm Saddle 128mm Titanium Rails Black this crankset was developed for a superior 1x drivetrain experience Included X SYNC 2 chainring is uniquely shaped to maximize wear and chain retention Use with SRAM Eagle chain for optimum performance Protective crank arm boots are included