Hey man,
No worries, it was nice to read about your truck. Here's a funny one for you - one of the mismatched tires on the rear of this truck presently IS a 215/85-16 as suggested, but the other is a 245/75-16. They are also different brands having a 1/2" difference in diameter. Can you imagine what this would do to a modern axle with limited slip? Wow . . and of course they are tubeless radials, whereas the fronts are bias-ply with tubes . .and 1 1/2" smaller in diameter. To some degree this reduces caster angle on the front - not ideal for straight-line stability.
I'm spending a few minutes right now looking at new tires online, but it's an incredibly gorgeous, spring-like morning here after rains last night, so outdoor adventures await!
Best,
Phil
