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Headset Sizing

Old 08-15-08, 07:16 PM
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Scouser08
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Headset Sizing

Is there a way to measure the size headset I need? I know it's threaded & think it's the standard 1" but don't know for sure. I'm new to building bikes from scratch & am trying to get the dumb questions out of the way as soon as possible lol. Or does anyone know off hand what size the headset is on a '75 schwinn varsity?


Cheers
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Old 08-15-08, 07:23 PM
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rhenning
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It is 1 inch but an odd 1 inch. I believe you need to use BMX parts to get it to work. Roger
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Old 08-16-08, 04:53 AM
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Albinus
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I recently encountered the very same problem. Headset on my decade-old MTB got trashed at a 24-hour event in the axle-deep mud, so decided to replace it. Went to an LBS (well, over the other side of town) and got a 1" headset. Too large for the frame. When I got home I took the old one up to my normal LBS, and they discovered it's actually a 1" ROAD headest! Which is different to the MTB and BMX versions. Your best bet would be to take either the frame (if you lack the old headset) or the old headset to your LBS and let them size it up for you.
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Old 08-16-08, 05:07 AM
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dabac
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Originally Posted by Albinus View Post
.. got a 1" headset. Too large for the frame. ..they discovered it's actually a 1" ROAD headset!
Are you sure it was the MTB/road confusion that got you and not the I.S/J.I.S (int'l std vs Japanese std)?

They're both labelled as 1", but the J.I.S are a few tenths of a millimeter smaller than the I.S.
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Old 08-16-08, 05:49 AM
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Albinus
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I'm sure - this was more than a few tenths of a millimetre, more like 1-1.5mm by my (very unscientific) visual guess. In any case the 1" road headset works just fine.
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