[Formulajones]

Originally Posted by 64speed

So does anyone know if a slight mismatch will chew up a Tru Trac

How slight? If you're only talking a 1/2" I probably wouldn't worry about it. If you're talking an inch and a half I'd probably either look into that further or change up my tire program. I installed a tru trac in dads car and although a mechanical type unit, I never really concerned myself with the spare tire deal because of how I keep the tire heights very close front to back.

Are you running a tire on the rear that is a drastically different height than the front? Like I said earlier if you keep that measurement pretty close, it doesn't matter what size spare you carry, just put the spare on the front and move one of the front tires to the flat rear tire.

That's been the trick for a long long time since these cars started coming with space savers 50 years ago. My Chevelle is a factory space saver spare with a posi rear. If I ever have a rear blow out, a front tire goes on the back and the space saver goes on the front.