The 2008 Shimano FC-M770 Hollowtech II crankset design maximizes stiffness while keeping weight to a minimum, and it features a precision two-piece construction for perfect chainline and chainwheel alignment. A carbon composite/steel composite middle ring adds rigidity for better shifting, increased service life, and smoothly delivers power to the cassette.
Details...
* Increased stiffness and improved shifting performance
* Outboard bearings maximize stability and stiffness
* Steel/carbon composite construction and middle gear doubles durability
* Thicker and stiffer 44T ring.
* Crank Arm Material/Finish: Aluminum/Anodized
* Spider Arm Material/Finish: Aluminum/Anodized
* Outer Ring Material/Finish: Aluminum/twice Anodized
* Middle Ring Material/Finish: Steel + Composite/Plated
* Inner Ring Material/Finish: Aluminum/Anodized
* Weight(claimed): 850g
