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@BringMeMyFix
Yes, but...
I massively notice the difference in pick up from 15-25mph on the 390g rims, compard to my ~440g Open Pros (although that's also bladed spokes versus plain gauge).
And is 30mm going to give an aero edge...?
Ultimately, I might feel a little insecure on the 19mm variety, so the respectably light semi-aero version is looking more likely.