It looks like a cassette type sprocket from here.
Sort of like this but without the width
Not sure what the bits that looks like threads are for. I have a hub with a similar body, the lockring screws into he end.
@O'Shane started
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It looks like a cassette type sprocket from here.
Sort of like this but without the width
Not sure what the bits that looks like threads are for. I have a hub with a similar body, the lockring screws into he end.