12-Speed 16 Tooth Cog

12-Speed 12 Tooth 2nd Position Cog

12-Speed 13 Tooth Cog

Ultra-Drive 10-Speed 13A Cog

Ultra-Drive 10 speed 14A cog

11-Speed 13 Tooth D Cog for 11-27 and 11-29 Cassettes

Centaur Ultra-Drive 17A 10 speed Cog

XTR M9000 11-Speed 11t cog for 11-40t Cassette

Campy Middle Position Cog - 10-Speed - 19 to 27t

Campy 11-Speed 13-Tooth Cog

Ultegra 6800 11-Speed 12t 1st position Cassette Cog

Dura-Ace 7800/7900, Ultegra 6700/6600, 10-Speed 11T Cog

Campy 11-Speed 12-Tooth First Position Cog

XT CS-M771 10-Speed 13t 2nd Position Cog for 11-32/36T

Dura-Ace 9000 11-Speed 13t 2nd position Cassette Cog

Ultegra CS6500 11t with Built-in Spacer

Campy 21t Final Position Cog 10-Speed

Dura-Ace CS-R9100 11-Speed 1st position Cassette Cog

Ultegra CS6500 13t 1st Position Cog

Campy Middle Position Cog - 10-Speed - 13 to 18t

Shimano Final Position Cog, 10-Speed

Shimano Middle Position Cassette Cog, 10-Speed

Campy Final Position Cog 10-Speed

XT M760 9-Speed 11T Cog For AQ-Group