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Sometimes you need a smaller cog, sometimes a bigger one luckily, the Surly Single Cog caters to your fancy. The machined SCM415 Cro Moly steel cog features a tall tooth profile to prevent chain skip and work with 6 9 speed 332in chains. Available in every increment from 13 22T for perfect gearingStackable and derailleur compatible for a multi speed drivetrain8 or 9 speed chain recommended but will work with 6 and 9 speed 332in chainsHeat treated for ultimate strengthChrome plated for surface hardening and improved chain lubricityFits Shimano compatible freehub bodies
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