Truvativ stylo 11g single chainsetthe revamped truvativ stylo oct 11g crankset features hollow forged open core technology aluminium crankarms that are an improvement in stiffness from last years solid forged units and the fully encased cross section means they are also lighter too the hard anodized 7075 t6 aluminium chainring comes in a versatile 32t size and is non ramped for better performance on one gear drivetrains a trick looking black anodized and machined aluminium outer guide is in