Shimano Ultegra FC-08 Crankset - 170mm, 11-Speed, 52/36t, 110 Asymmetric BCD, Hollowtech II Spindle Interface, Black Stem Aluminum crank arms are deep

Aluminum crank arms are deep pocket forged for maximum strength and then CNC machined to shave every unnecessary gram of weight

37" x 24tpi hub threads

and Tiagra ST-4700 levers only

CRR SL - 2011-2012

Shimano Ultegra FC-08 Crankset - 170mm, 11-Speed, 52/36t, 110 Asymmetric BCD, Hollowtech II Spindle Interface, Black Stem Aluminum crank arms are deepAn integral part of Shimano's 11 speed road lineup, the Ultegra FC 08 crank builds upon Shimano's legendary front shifting and transmission efficiency. This crank is designed to provide stiffness, strength, weight savings, and rotational performance. Hollowtech hollow forged crank arms not only the bike's weight, but decreases rotating mass to aid in acceleration Hollowtech technology reduces weight without reducing the crank's strength and rigidity