The engineers at SRAM have improved upon the first generation Red crankset by going bigger, and ultimately offering a lighter, stiffer, and more precise crankset. Built with Exogram technology, the new SRAM Red BB30 Crankset uses a larger carbon optimizing structure, which enables them to use less material without sacrificing stiffness. The crankset features a considerably burlier arm shape with a true hollow cross section. The design also allows them to rotate the spider in order to utilize the large, sturdy crank arm. The number of spider arms has been cut down to four, giving the cranks a sleek, air splitting profile. By rotating the spider, SRAM has integrated a mounting bolt location within the existing carbon structure, which reduces weight and deflection from shifting. The result is quicker, more accurate front shifts. To ensure compatibility with aftermarket chainrings, SRAM stuck with the 130mm bolt circle diameter standard. SRAM's stiffer X GlideR chainrings are 5mm thick 7075 T6 aluminum and have been carefully modified to work with the 11 speed drivetrain. The chainrings feature enhanced shift pins and shifted ramp profiles to work seamlessly with the Yaw caged front derailleur.