I measured the runout down where the bead sets because the edge of open center wheels is often not true. I tacked a little at a time and got it within .050. I'm not so sure that excessive runout makes much difference. Back from the 60's until the early 90's I bought trucks with spoke wheels and drove them until I found Budd hubs for the steering axle and then converted the steering axle to Budd. We noticed no difference in handling with spoke on the steering, steel Budds or aluminum Budds on the steering axle. Of course the drivers liked the looks of the aluminum better. Radial runout makes a lot of difference, but with lateral runout, I don't think 20" tires turn fast enough to make a whole lot of difference.
