said by Steve: said by Juggernaut:
And, in the case of drilled rotors, it reduces unsprung weight.
Isn't this just a couple of ounces? Is this difference even noticeable?
In racing, every ounce makes a difference.
Save a couple ounces here, a few there, it'll add up.
Even if you add the same weight back with ballast, you can place that weight where you want.