Shimano Ultegra CS-6600 10-Speed Cassette

Designed for high-performance 10-speed road bikes, mainly aimed at racing juniors and lower teeth. The hyper-glide sprockets have been specially computer designed to create a specific configuration that results in a smooth shift even when under high impact.

Features

• Weighs 235g
• Designed for super narrow 10 speed HG chains
• Sprockets cut away and drilled
• Reduced weight
• Close ratio gearing