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hippy
@svenhöek
Not much I would guess, the main benefit is making the wheel feel like a smaller rim depth (ei controllable) than it is.
In theory the wheels should get lower drag and even negative drag at wider angles, but that depends on zipps implementation.
The wheels also have fancy new dimples. These could lower drag at 0 degrees by keeping the air attached further round the rim shape, but no graph / data / comparisons yet