large chance thats a converted road wheelset with a bb lockring as lockring for the thread of the freewheel. this is also called a suicide hub since when pedalling backwards the lockring can unthread because the thread is not reversed like proper track hubs.
large chance thats a converted road wheelset with a bb lockring as lockring for the thread of the freewheel. this is also called a suicide hub since when pedalling backwards the lockring can unthread because the thread is not reversed like proper track hubs.