This OD Crank Single Speed Spacer Kit gets your Surly OD Crank ready to run as a single. Indluces chainring bolts and spacers. Just add chainring (sold separately).
Surly offers you spiders for their Mr. Whirly Cranks in a variety of Bolt Circle Diameters (BCDs) so you can run nearly any chainring combination you want. Be sure to check chainring/frame compatibility for your intended setup.
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