Innovation often comes from places youd least expect in order to make a lighter crankset we made it bigger to add stiffness we used less materialthe new sram red exogram crankset is completely hollow all the way to the spider its hidden bolt pattern makes better use of carbon fiber to further improve stiffness and shed weight the stunning x glide r chainrings are optimized for use with the yaw technology in the front derailleur delivering seamless flawless performanceexogram technolog