Sprint-worthy stiffness meets climb-friendly weight in SRAM's RED 22 Crankset. Its hollow carbon construction minimizes weight and maximizes stiffness while the chainrings attach with a hidden 5th bolt that uses the crank arm as the mounting point to further increase the stiffness and shed weight. The X Glide R chainrings start out as 5mm-thick aluminum plates and are precision machined to eliminate all unessential material while retaining extreme stiffness. Then, they are carefully ramped and pinned to provide lightning fast shifts. With so much great technology and 11-speed compatibility, your competition with be RED with envy.