Innovation often comes from places you'd least expect. In order to make a lighter crankset, SRAM made it bigger. To add stiffness, SRAM used less material. The new SRAM Red 2012 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 & shed weight. The stunning X Glide R chainrings are optimized for use with the YAW Technology in the front derailleur, delivering seamless, flawless performance.