• 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

This specs are from the information each brand releases and may change without previous notifications.