sram-force-bb30-bb386-172-5mm-crankset-50-34-chainrings-bearings-not-included
sram-force-bb30-bb386-172-5mm-crankset-50-34-chainrings-bearings-not-included, Unidirectional carbon fiber arms and aluminum chainring spider provide excellent strength-to-weight. X-Glide tooth profiles and shift assist pins enable quick and reliable front shifting.Hidden" chainring bolt threads into crank arm to enhance chainring stiffnessChainrings are optimized for Yaw front derailleurQ-factor is 145mm