Yes, you can get them, and also, esp for the polo cog, try to get a surly one (they aren't cheap) that have a wider 'foot' to spread the load on the cassette body, otherwise, they dig in a fuck up the body.
@turnpedal started
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Yes, you can get them, and also, esp for the polo cog, try to get a surly one (they aren't cheap) that have a wider 'foot' to spread the load on the cassette body, otherwise, they dig in a fuck up the body.