I already wrote it ...This thread got side tracked big time with all the diy tubeless discussion.
A few posts seem to suggest that it was determined that 2020 tubeless wheels don't fit the earlier models but those posts got lost in the off topic chatter.
Was this incompatibility confirmed?
16-17-18-19-20-21 tubed wheels are all the same
20-21 ATAS are tubeless
you can fit tubbed wheels on 20-21 ATAS only with complete wheelset ( discs, abs rings , front spacers)
you can 20-21 ATAS wheels on NOT tubeless bikes only with the complete wheelset ( discs, abs rings , front spacers)
rear spacers are the same , rear sprocket drum the same .
18 all black wheels in 21-18
rally raid gold wheels in 19-17