XTR 1" THREADED HEADSET

:?: Sorry but I don't know what you mean as well by this terms in relation to headset. Can you explain?
 
Skeelsie":38cw0ene said:
Hmm nice, just asked the seller if it's ISO or JIS and he doesn't know. So buy with caution.

ISO and JIS are for square taper bottom bracket . :?
 
cchris2lou":s8n9fj2d said:
Skeelsie":s8n9fj2d said:
Hmm nice, just asked the seller if it's ISO or JIS and he doesn't know. So buy with caution.

ISO and JIS are for square taper bottom bracket . :?

JIS 1" headsets have a 27mm crown race instead of a 26.4mm race.

They also have 30.0mm frame cups instead of 30.2mm, this doesn't sound like much of a difference but with the short insertion length a JIS will wang about all over the place in an ISO frame. That coupled with a crown race slacker than a brothel queen will result in a warped frame and loads of play.

http://www.sheldonbrown.com/cribsheet-headsets.html
 

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