yeah, make sure he is not using a Campi or Miche lockring (unless he's running a miche or Campi hub ofcourse). The cogs seem to fit on both types but the lockrings are different. I put a miche lockring on my system EX hub on my frist fixed gear bike and it was just sitting there not holding a darn thing but still enough thread to sit there looking like it was.
I really like the miche lockring because you can use it with the Park Tool BBT7 bottom bracket tool and is way better than the hook spanners. Shame it only works with italian track hubs.
yeah, make sure he is not using a Campi or Miche lockring (unless he's running a miche or Campi hub ofcourse). The cogs seem to fit on both types but the lockrings are different. I put a miche lockring on my system EX hub on my frist fixed gear bike and it was just sitting there not holding a darn thing but still enough thread to sit there looking like it was.
I really like the miche lockring because you can use it with the Park Tool BBT7 bottom bracket tool and is way better than the hook spanners. Shame it only works with italian track hubs.