![]() Shimano Ultegra 10-speed FC-6600 Triple Crankset Now with Hollowtech II, Ultegra now uses the same integrated Bottom Bracket spindle design previously only available on Dura-Ace Cranks. BB spindle is included, BB cups must be purchased separately. (part number SH-BBC6600). 52/39/30 rings, 130/74bcd bolt pattern. Specify Length: 170, 172.5, or 175mm. |