Shimano Dura-Ace CS-7900, Ultegra CS-6700 10-Speed 11t 1st Position Cog, “B Fit” for 105 CS-5800

Shimano Dura-Ace CS-7800 & Ultegra CS-6700, 6600 10-Speed Cassette Cogs 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 Tooth Count: 11

SKU: FW4667