1 inch threadless headset with 27mm crown race

jimbog

Senior Retro Guru
Hi all, just wanted to put an issue out there for comment. I am building a 94 Serotta ATX with a 1 inch steerer tube. I sourced a rigid fork that I would like to use but as usual there’s a hick up. I bought a cane creek threadless headset which came with a 26.4mm crown race. I assumed that this would fit the fork but it appears to have a JIS 27mm crown. I am searching for a 1 inch threadless headset with a 27mm crown race but most have 26.4mm.
I assume that such a thing exists and has anybody got a recommendation? I think the one below may come with two sizes crown races but no websites seem to confirm this. Ignore the 1/18th on the pic, it’s the description below that makes me think that it will come with both crown race sizes.
 

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With a bit more googling I am pretty sure this one come with both crown races so I have purchased one.
 
It does! You can always asks a bike shop to cut the crown down to 26.4 too - though not a lot of shops will have the top these days.
 
It does! You can always asks a bike shop to cut the crown down to 26.4 too - though not a lot of shops will have the top these days.
Found it hard enough to find a bike shop with a steerer thread cutter a while ago, let alone this! Though it easier just to replace the headset 😀
 
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