e*thirteen EX extended range cog 40t

e*thirteen EX extended range cog 40t

Weighs 71g in 40t version. Designed to work with 10 speed 11-34 Shimano cassettes. Also works just as well with 9 speed 11-34. Shift cutouts on 34t are in the same position on 9 and 10 speed cassettes, so this 40t cog works fine even with a 9 speed setup.

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