The SRAM Red groupset is at the forefront of precision shifting and crispness. So when SRAM tried to improve on it even more, the only thing that stood out was the need to make the leap to 11 speeds. The Red 22 GXP Crankset provides you with True 22 shifting for ultimate performance. While the original SRAM Red cranskset used a carbon wrapped foam core to mold the cranks, the design was moved to incorporate a true hollow cross section. By laying up the carbon to create a much larger shape, SRAM is able to use less material while maintaining the power transferring stiffness desirable to all riders. Additionally, the spider was rotated to take advantage of the new shape. The mounting bolt is now positioned on the back of the crank arm within the carbon. In doing this, the deflection during shifting is minimized. While the spider arms have been reduced down to four, SRAM chose to use a standard 130mm bolt circle diameter so that aftermarket chainrings are compatible. The included chainrings are SRAM's Exograms, which have been worked to complement the movement of the yaw caged Red front derailleur. They use a design called X Glide R and are machined from 5mm thick 7075 T6 aluminum. SRAM used extensive computer aided finite element analysis for optimal ramp profiles. Excess material was eliminated to further reduce weight. The Red 22 GXP Crankset is compatible with the SRAMTruvativ GXP standard, including the low friction hybrid ceramic bearing option.