Designed specifically for use with H11 groupsets Required for use with H11 Ergopower shift levers, the crank spider is shifted outward to adjust for 135 and 142mm hub spacing while maintaining the Q-Factor Full carbon crank arms and spider are hollow for minimum weight and maximum stiffness Features Campagnolo eXtreme Performance Shifting System featuring optimized chainring teeth to work specifically with Campagnolo drivetrains Features USB ceramic bearings which are 50% smoother rolling than previous standard Campy bearings Double standardized bolt circle diameter allows for use of standard, mid-compact and compact chainrings Requires use of Ultra-Torque bottom bracket cups Spindle Type UT Speed 2x11 Weight 603g Requires use of Ultra-Torque bottom bracket cups Designed specifically for use with H11 groupsets