Originally Posted by BSharp
...when you have different front and rear tire sizes? A rear-sized tire on the front will interfere, and a front-sized tire on the rear will make your limited-slip diff unhappy. How far can you drive a limited-slip with different diameter tires? Okay, that depends on the difference, but what's the best choice for a spare?


I have different front and back too, found a Ford spare that is exactly in the middle, size wise.
So it works front and back with less than 5% difference in size for either.