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gbj_tester in reply to @Scilly.Suffolk

The press-fitted chamfered bit is the bearing seat, you can probably leave that if you're replacing the lower bearing cartridge with another one with the same chamfer angle. The loose bit with the ball track is the inner race of the lower bearing, there's usually some kind of circlip to stop it from separating from the outer race which sits in the head tube or lower cup.

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Scilly.Suffolk in reply to @gbj_tester
It has caged bearings (top of HS on left, bottom on right).

So the first one is a seat for a cartridge and the second is a race for "open" bearings?

Is that just for ease of production, ie assemble just one fork/race and add the race for cheaper models using caged bearings?

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gbj_tester in reply to @Scilly.Suffolk

Is that just for ease of production, ie assemble just one fork/race and add the race for cheaper models using caged bearings?

Looks like it. I've seen some cheap headsets that are put together like that.

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