Bike Forums - View Single Post - (Two) Peugeot PR-10 from the 70's

11-09-19, 09:27 AM

#14

alexnagui

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Quote:

Originally Posted by verktyg

The French Standard for the headset crown race is 27.0mm ID. Some Japanese headsets are/were made in that diameter but most non French headsets have a 26.4mm or 26.5mm ID.

All Campagnolo headsets have a 26.4mm ID... But I think the NJS Keiren track racing standard is 27.0mm so Campy maybe makes some special headsets for that market???

verktyg

Thanks for your post, verktyg!

I saw on the website of Sheldon Brown that French headset crown race I.D. can be also 26.5mm. Is that so?
I suppose that the crown race seat in question has been reamed to accept 26.4mm crown races. Standard French crown races most likely won't work anymore, will they?

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