On-one hubs - they look identical to dimension hubs. The solution to your problem is to use rotafix on the cog and then get hozan lockring pliers and really tighten the lockring on.
It also helps not to use cheap cogs/lockrings. It also helps even more not to have a spacer on the lockring (why?). Less thread engagement on the lockring = bad.
The other solution is to get a brake and stop skidding.
Last edited by operator; 11-06-07 at 07:05 AM.