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do I need to worry about the loose fit on the crown race
Yes. On a conventional headset, not having the crown race be the correct press fit on the steerer will permit radial play, which will show up as clunks in the steering and braking and accelerated wear on both headset bearings.
The innicycle site is down for me so I can't tell what kind of bearings it uses, but if they're common angular contact cartridge bearings with chamfered seats, there are two possibilities:
- the "crown race"(actually the seat for the cartridge bearing inner race housing) is already split, and it's going to do what it should or
- the "crown race" isn't split, and you can split it to make it do what a collet should, and what a collet does for all AHeadSet upper bearings and quite a few lower ones
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- the "crown race"(actually the seat for the cartridge bearing inner race housing) is already split, and it's going to do what it should or
gbj_tester
motman
I’ve been installing one of these InniCycle headsets which convert 1” threaded to a 1-1/8” threadless steerer on a mid 90s Italian steel frame. The crown race is 26.4 standard, the issue is that when I went to fit this on the fork it just dropped on as it’s slightly too big. At first I thought maybe it’s some weird Italian sizing on the fork but from what I can see on Sheldon’s that would make it slightly larger than 26.4. Perhaps at some point someone has been a bit over zealous with the file is the only explanation I can think of.
Anyway I slapped some grease on the crown race and fitted the fork into the head tube and screwed on the top section just to see how it all came together. I’ve not tightened the expanding bolt yet but the fork and headset rotate smoothly with no play already.
My question is given the top section of this headset screws onto the threaded steerer do I need to worry about the loose fit on the crown race or should I start cutting up coke cans and shim it on to get a tight fit?
https://youtu.be/jhD8evK6jLg?si=2APjzLFlhfx-sszV