Which 1" threaded headsets are JIS and english thread

Am I having a blond moment or was it just the crown race that was JIS size ...........the threads being ISO / English / Italian or French depending on model?

Shaun
 
JIS and ISO threads are the same pitch, the difference being the cups and crown race
JIS 30.0mm cups 27.0mm race
ISO 30.2mm cups 26.4mm race
Think I will try and file the steerer to accept ISO race?
 
Sorry, it was the mention of "Threads" in the title that had me thinking...hand filing the steerer for a smaller crown race is not easy. Is there not anything on evilbay and the like?

Shaun
 
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