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PostPosted: Sat Jun 01, 2013 12:38 pm 
Old School Grand Master
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Joined: Wed Aug 08, 2007 10:35 am
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Location: Penarth
Searching for one of the above...but which era Shimano headsets were JIS, if any?
Ta
Carl


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PostPosted: Sat Jun 01, 2013 12:50 pm 
Old School Grand Master
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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


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PostPosted: Sat Jun 01, 2013 12:52 pm 
Old School Grand Master
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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?


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PostPosted: Sat Jun 01, 2013 1:06 pm 
Old School Grand Master
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Location: Cumbria
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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PostPosted: Sat Jun 01, 2013 1:51 pm 
Old School Grand Master
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I am narrowing it down...a Shimano 105 HP-1055 JIS looks perfect


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PostPosted: Sun Jun 02, 2013 5:30 pm 
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I have a dura ace JIS headset new in box which is now surplus.


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PostPosted: Mon Jun 03, 2013 9:20 am 
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http://sheldonbrown.com/gloss_ta-o.html#threading


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