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- Hollowtech II design: Optimum balance of lightweight and stiffness
- Hollowglide outer ring- hollow chainring construction: Rigid chainring efficiently receives the chain from the inner chainring
- Improved chainring clearance: Less chain rubbing on outer ring when in small/small gear combination
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With the same engineered technology as the Shimano Dura-Ace crank, the Shimano Ultegra FC-6700 road crankset uses a hollow outer chain ring to save weight and boost rigidity for optimal power transfer and positive shifting under load. New Grey finish.