8.25 x 16.5 Western Wheel Turbines - Tire size

[71CHEVYSHORTBED402]

Just picked up five 8.25 X 16.5 Western Wheel turbines for dirt cheap, though it might have been a wasted effort. I have the same 8.25 X 16.5 wheels on my fronts, which have 9.50 X 16.5 tires on them. Therefore it seems the 9.50" tire is the correct fit. Doesn't mean it is.

Anyway, the reason I bought these new turbines was to replace the 9.75 X 16.5 wheels on the rears, which require a 12.5" tire, and I can't justify the expense.

Ironically, the 8.25" wheels I picked up have 12.5" tires on them, just like what's on my 9.75" rear wheels. So I'm left wonder what the heck.....I may have bought five wheels that require the same tires I was avoiding.

At any rate, does anyone know if the 9.50 X 16.5 tire is correct for a 8.25 X 16.5 wheel? That and/or tires suggestions.

Thanks