WCS headset included (upper IS42/28.6 - 16mm stack height | lower IS42/30) https://ritcheylogic.com/search?q=WCS+headset+upper+IS42%2F28.6
Headtube: straight 1-1/8" headtube
Ritchey Carbon Adventure Fork with multi-purpose, rack and fender mounts
1-1/8" straight steerer with integrated 45-degree crown race
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33075347001
$54.95
Incompatible with Ritchey WCS Carbon forks with integrated 45° crown race
https://ritcheylogic.com/bike/headsets/classic-external-cup-ec-threadless-headset
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https://www.whiteind.com/product-category/headsets/