I can’t wait until this “I want my uni as light as possible” fad blows over… 
The hub sits at the center of the wheel. A few extra ounces of weight savings here won’t affect the wheel’s moment of inertia nearly as much as a few extra ounces of weight saved at the outside of the wheel.
You want a wheel with low inertia? Cut off the knobbies on the outside of the tire. Get a carbon fiber stem cap. Replace your rubber inner tube with a mylar balloon. Fill it with hydrogen. Scrape the paint off your rim and spokes. Now you’ve got a light wheel!
I think you’re looking for this thread.