Taking cues from the SRAM Red 22 Exogram cranks, the Force 22 cranks match a uni-directional carbon fiber crank arm with a CNC-machined alloy spider. The result makes better use of the best properties of both carbon fiber and alloy to keep weight low and optimize stiffness. The spider also borrows the hidden bolt pattern design from the Red 22 Exogram cranks to further reduce weight and increase stiffness. The cranks feature Glide R chainrings, which have been engineered for stiffness, and made thinner to accommodate 11-speed chains. These chainrings were designed from the bottom up to work with the Yaw 22 front derailleur, so you'll get crisper, more accurate shifting with each lever throw. The stiffness also translates into improved power transfer, so you get the most out of every watt you put into the bike.