Shimano Dura-Ace CS-9000 Cassette Cog - 11-Speed 12t 2nd Position CheckoutTitle=Enduro 6802 Sealed Cartridge Bearing Excellent ventilation provided by 10

Excellent ventilation provided by 10 air inlets and 7 air outlets

(mm) 32 Material Stainless Steel Thickness 7

Flattop technology allows for a narrower chain with quieter operation and increased strength and durability

}Shimano Sora R3030 (non-chainring guard model) 30t 74mm 9-Speed Inner Chainring Black

Features an on/off switch for awareness when you need it

Shimano Dura-Ace CS-9000 Cassette Cog - 11-Speed 12t 2nd Position CheckoutTitle=Enduro 6802 Sealed Cartridge Bearing Excellent ventilation provided by 10Shimano Dura Ace CS 9000 Cassette Cog 11 Speed 12t 2nd Position. Shimano Dura Ace CS 9000 & Ultegra CS 6800 11 Speed Cassette Cogs TECH SPECS Tooth Count 12