Bicycle Mechanics - Headset Crown race on '84 Team Fuji: 27 or 26.4??

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steve-d
03-23-09, 03:35 PM
I'm sorry, I'm at a loss. The bike came with a Tange Falcon headset and it is shot.

I've been looking and concluded the Levin is the best replacement headset as far as cost and stack height.

I measured the OD of the area where the crown race is pressed onto the steerer tube and it is a 27mm.

I know it is an interference fit, but what is the correct headset size: 26.4mm or a 27mm? All I've come across is the 26.4mm flavor.

S Brown's site didn't help much as I'm not sure if the bike qualifies as JIS or ISO.

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

best

Steve

Gonzo Bob
03-23-09, 06:14 PM
If it were ISO, it'd measure 26.5mm or so. 27mm is JIS.

Can you remove the crown race? When I removed the crown race off my old MTB fork (Tange Falcon headset), "27.0" was stamped on the under side.
well biked
03-23-09, 06:47 PM
If it were ISO, it'd measure 26.5mm or so. 27mm is JIS.

Can you remove the crown race? When I removed the crown race off my old MTB fork (Tange Falcon headset), "27.0" was stamped on the under side.

Not necessarily. There are ISO headsets with 27.0mm crown races. I've got one on my '83 Centurion. For a Team Fuji from that era, I would guess it's ISO, but it's just a guess.

Measure the inside diameter of the headtube where the cups press in, and then go here (scroll to the bottom for "headset standards summary"):

http://www.parktool.com/repair/readhowto.asp?id=68