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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.
gbj_tester
@Scilly.Suffolk
Trashed Ritchey IS headset in a Scott CR1: what's this two-piece crown race all about?
I was going to suggest a Cane Creek 40 as a replacement: do I need to remove both parts?
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