Well, I will leave it at 87. I just looked for larger diameter tires same 16in. rim. Firestone Transforce AT @ 31.7 od. with 85 aspect. I have now Michelin 75's @ 30.5 in. this will make diff. ratio 3.94. Maybe slight better mpg. ( see Ricksontire.com for calc.)
I came back to my truck today and one of them had blown a huge hole in it ! They are from 08 and half the tread. Something else huh? Must be the Az. heat.