The Shimano CN-6600 10-Speed Ultegra Bike Chain now features an asymmetrical (directional) chain. Shifting precision and smoothness has been significantly improved through the use of different inner and outer plate chamfers and dimensions to accommodate the different shifting requirements of moving the chain inward and outward on the drivetrain.
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Shimano Ultegra CN-6600 10 Speed Chain
Sale price$59.99
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