New for 2016, Turbine 11 speed chainrings, made from 7075 aluminium are built to lastKey Features:Rings are CNC'd from 7075 alloy, creating a ring with instantaneous smooth and quiet shifting, even under load..These 2x rings are super stiff at a minimal weight, resulting in a ring that demonstrates sharp and quick shifts while being highly resistant to impacts..Specifications:BUILT FOR: XC,COLOUR: Black,RING CONFIGURATION:,11 spd – 24/34 (104/64BCD),11 spd - 26/36 (104/64 BCD),11 spd – 28/38 (104/64BCD),Rings are available individually or as sets.