Chainset includes integrated bottom bracket oct construction is stronger and lighter than standard solid core alloy cranks power glide chainrings are competition proven with long lasting finishes chainring made of pg chainrings with hard anodized coating sram roads open core technology to save weight and put more power to the road the crankarms are hollow and forged from 6066 aluminium for maximum strength with minimum weight plus the rival crankset comes with sram roads smooth spinning