[aerotruk63]

In the old days they would turn the drums with the hub, therefore you would not need to remove the drums till they were oversized. They also used to balance the tires and rims on the truck, apparently to balance the whole system instead of just the wheel and tire. Had this done to a 62 K10 I used to have with 39" tires, man you would think the truck was going to tear itself apart till they got the assembly balanced.