SHIMANO ULTEGRA FC-6600 DOUBLE CRANKSET

The new 6600 Ultegra group now incorporates the Dura-Ace-style Hollowtech II outboard bearing integrated spindle design. This kit includes both crankarms, rings, and spindle. (Please see item# BB603E00 for bearing cups). The Hollowtech II design delivers massive improvements in stiffness, durability, and weight savings. SG-X chainrings deliver smooth upshifts, even under power.  Installation wrench sold separately Weight: 823g Compatibility: Designed for 10 speed drivetrains