You can screw a fixed cog(sans lockring) onto the freewheel side which will be fine if you are running it at the track or if you run it on the streets with a brake. Brakeless is a no-no but.
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You can screw a fixed cog(sans lockring) onto the freewheel side which will be fine if you are running it at the track or if you run it on the streets with a brake.
Brakeless is a no-no but.