Shimano Cog “B Fit” (11T) (For Dura-Ace CS-7900, Ultegra CS-6700) (1st Position)

Shimano Dura-Ace CS-7800 & Ultegra CS-6700, 6600 10-Speed Cassette Cogs

Features:

• 1.6mm cog thickness
• “A-fit” for Dura-Ace CS-7900, CS-7800 and Ultegra CS-6700, CS-6600 cassettes using 12 tooth 2nd position cogs
• “B-fit” for 105 CS-5700 and CS-5600 cassettes using 12 tooth 2nd position cogs