Innovation often comes from places you would least expect. In order to make a lighter crankset, we made it bigger. To add stiffness, we used less material. The Sram Red 22 Exogram 50/34 GXP Crankset is completely hollow all the way to the spider. Its hidden bolt pattern makes better use of carbon fibre 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. Exogram technology uses a large, hollow cross section all the way to the spider, minimizing weight while maximizing stiffness. Sram's stiffest crank ever.