Internal or zero stack? If the bearings go into the frame internal then no.
Not strictly true (although you will need a tapered steerer and the kits effectively create an external setup)...
https://9point8.ca/collections/slack-r-kits
Good to know but seems like a pain in the arse and definitely not worth it on a road bike.
@Alb started
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Internal or zero stack? If the bearings go into the frame internal then no.