That won’t work. there is no flats on the lower cone for a wrench to be used on. Harold74’s pictures are kind of bad so that you can’t see the headset clearly. Here’s something that shows the ring better. It uses a hook spanner on the lockring. The Hozan ones Harold74 links to may not be the right size as well. In addition, the knurled top cup needs a http://headset race plier to adjust it. A large adjustable plier (aka a channel lock) can be used in a pinch but it does bugger up the finish.




These kinds of headsets are particularly finicky since there are 3 parts that need locking…the lower race (which also locks against a toothed ring), the middle nut that is adjusted with the hook spanner, and the top nut. And, to make matters worse, the headset has a brake cable hanger that interferes with use of the lock ring spanner. It’s a bloody nightmare!