Shimano Ultegra 6600 10-Speed 15-25t Road Bike Cassette

Shimano Ultegra CS-6600 10-Speed Cassettes* 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* Ultegra CS-6600 cassettes with a 13-16-tooth first-position cog are not compatible with Dura-Ace FH-7800 hub or WH-7800 wheelItem Specifications---Weight: 245Cassette Body Type: Shimano/SRAM 8, 9, 10 SpeedCassette Cogs: 15-16-17-18-19-20-21-22-23-25Range: 15-25Drivetrain Speeds: 10

Shimano Ultegra CS-6600 10-Speed Cassettes 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 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 Item Specifications Weight 245 Cassette Body Type Shimano/SRAM 8, 9, 10 Speed Cassette Cogs 15-16-17-18-19-20-21-22-23-25 Range 15-25 Drivetrain Speeds 10