i used one on my first conversion. locktite on the hub/adaptor threads, then grease on the cog/adaptor, then a BB lockring. its basically a suicide hub for someone who's too lazy or doesn't want to bother redishing. i wouldn't recommend it, but it worked. fyi, i rode with a brake and learned to do skids on it with no problems. that wheelset is no longer in use, but i still can't get that cog off to save my life; with chainwhip or via the rotafixa method!