SHIMANO ULTEGRA FC-6603 TRIPLE CRANKSET

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SHIMANO ULTEGRA FC-6603 TRIPLE CRANKSET
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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.

6603 version incorporates a triple ring that's perfect if you live in very hilly terrain, do loaded touring, etc. Installation wrench sold separately