Shimano Ultegra CN-6600 10-Speed Chain - Hyperglide 10-Speed chain - Ultegra 6600 and 105 5600 chains are recommended for use in conjunction with Ultegra 6703 and 105 5703 triple - Optimized chain for HG sprocket which provides a fast and precise rear shifting performance (especially during downshifts) - Chromized rivet pins improve wear resistance - Zinc-alloy plated outer link surface treatment - Chain Connection Type: Pressed Pin - Color: Silver/Gray - Defined Color: Silver - Drivetrain Speeds: 10 - Half Link Chain: No - Links (links): 116 - Weight: 280 grams - Width: 6.1 mm