Maybe up around 60,000 rpm’s.
That little bit shouldnt make a difference. I wonder about these things too, like putting hubcaps on a car,i have never seen one balanced.
Centre hole in washer must be over sized, would explain the eccentricity.
Agree that the small offset so close to center wouldn't effect balance.
I don't know if that's OEM bolt and washer nor do I know if the pulley would help hold the washer centered while tightening.
I have some hubcaps here that have OEM balance weights on them. These are the 3 piece mag looking hubcaps from a Fury. The heavy caps that would easily leave the car LOL