If Vagens needs fast, black rims then carbon is the obvious choice.
If you want black aluminium rims that last, see my link.
You're welcome.
Carbon clinchers are no choice either - this is the ultimate culmination of negative criteria: expensive, heavy as aluminum, bad braking with heat failure issues when using on long steep descends.
Maybe ask in the wheelbuilding thread when you've decided what the rims are for.
/derail
Disc brakes ftw
You can then have nice rims that are not going to be problematic when braking.
@speedvagen started
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If Vagens needs fast, black rims then carbon is the obvious choice.
If you want black aluminium rims that last, see my link.
You're welcome.