Tire size question

[M Evertsen]

Ok, another question that is driving me nuts, and I CANNOT find the answer anywhere.

I am needing to get new tires for my truck. It had the original split rims when I bought it, which I switched out to regular steel rims (traded them to a neighbor's bone yard).

The original tires were either 7.5, 8, or 8.5 16.5 (I still have the spare buried under all the crap in the back of the truck and can confirm).

At any rate, I have tried finding tire size conversions, and all of them stop at 15 inch tires. This one is really driving me crazy. I am just wanting to duplicate, or come real close to the factory tire size.

The tires I traded for are 235/85 R16, which I think look a bit too big for the truck. They do not match, and were just on the rims, so it worked out.

Is there a chart out there somehwere that shows the tire sizes for 16.5's?

Or does somone know which ones will work for the sizes I have listed.

I think I am going to be looking at

215/85 R16
225/75 R16
235/85 R16

Just not sure which ones will match.

ETA - these will be for a 69 C20