https://mywindsock.com/segment/1187651/leaderboard/#forecast=1561485600
Assuming that the Hed/disc is ~1kg heavier, then it would need to be around 0.025 better CdA to be faster.
I would go lightweight.
HED3 weighs 1100g in tube and tyre Disk weighs 1819g inc tube, tyre and cassette
@cjr started
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https://mywindsock.com/segment/1187651/leaderboard/#forecast=1561485600
Assuming that the Hed/disc is ~1kg heavier, then it would need to be around 0.025 better CdA to be faster.
I would go lightweight.