What size tires and wheels are standard on a 1982 G-30 Chevy Van?

The 1982 Chevy G-30 van didn't have a single standard tire and wheel size. The size depended heavily on the options selected (like payload capacity and engine). You'd find variations ranging from 16-inch to 16.5-inch wheels, and tire sizes would vary accordingly, commonly in the LT235/85R16 or similar ranges. To know the *exact* original size for a specific van, you'd need to check the doorjamb sticker (usually near the driver's side door) or the owner's manual.