Upgrade your single speed to this amazing 19 tooth cog from Surly, local Bike and Brew lurker Spencer runs one on his Surly. (He has a lot of them)
Our cassette cogs are designed first and foremost for singlespeeding, but being that we’re Surly, we bumped up the versatility a bit. At the base, the cogs are 4.35mm wide, which allows you to stack a few of them up for a simplified multi-speed drivetrain. Use a 9-speed derailleur if you do that.
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