This 11 speed mountain bike chainset is equipped with a carbon crankarm construction, which makes it stiff when climbing & lightweight when descending. SRAM has also kitted out this model with a forged aluminium spider for a superior strength to weight ratio as you hit the trails. Coming complete with a tough aluminium X-Sync direct mount chainring that's also CNC-machined, this version delivers fantastic torque power without adding any unnecessary weight to your ride. One final highlight is its chainring's tooth design features tall, square-shaped teeth for maximum chain control on the most demanding of terrain conditions. Manufacturer's Part Numbers: 00.6118.361.001