NEW Shimano Ultegra CS-6600 10 Speed Cassette Shimano Ultegra CS-6600 Cassette - 10 Speed, 14-25t, Silver groupset-speeds-10 The Super SLR design makes

The Super SLR design makes use of a friction-reducing mechanism in the lever and cable that improves response and modulation

but the Trio works with them all

Labeled Size: 650 x 47

less crisp shifting than cogs designed for multi-gear systems

4 Threadless

NEW Shimano Ultegra CS-6600 10 Speed Cassette Shimano Ultegra CS-6600 Cassette - 10 Speed, 14-25t, Silver groupset-speeds-10 The Super SLR design makesShimano Ultegra CS 6600 10 Speed Cassettes. Ultegra CS 6600 cassettes with a 13 16 tooth first position cog are not compatible with Dura Ace FH 7800 hub or WH 7800 wheel Compatible with all 10 and 9 speed Shimano hubs except for 13 16 tooth first position cog cassettes which are not compatible with DA FH 7800 hubs or WH 7800 wheels Cassette Cogs: 14 15 16 17 18 19 20 21 23 25 Color: Silver Cassette Body Type: Shimano SRAM 8, 9, 10 Speed Drivetrain