Matching tires on an axle

[buck91]

Just picked up a flat by way of a nice screw into the very corner side of the tread. Definitely outside the belts. Bummer. I also just so happen to have a brand new unsused spare Michelin Pilot Sport A/S that has been sitting in the garage for years. Its date code 0907 but looks and feels brand new, not even any ozone checking.

Anyways, my current set of tires are on their last legs, probably 4/32 tread left. With the expensive carbon fiber trac-lok clutches I installed a few years back, I don't much want to burn them up faster than necessary by running offset tire sized on the rear end. Assuming both tires will be new, 245/45r17 with the same load and speed ratings, how close do I need to match the rated revs/mile in order to avoid premature limited slip wear?

 

[slacktide_bitog]

In your case, just use the spare until you can get a set of new tires. Even though you missed the labor day sales, you should probably be able to make it until the black friday sales

 

[FlyNavyP3]

Buck, why not just put the new tire on the front axle? I'd measure and compare the circumference of the two tires in question as it will give a more accurate representation of the different rotation rates of the 2 tires on the rear axle. But the preference would be to use it on a non drive axle if possible.

 

[bubbatime]

4 new tires. Done.

 

[bigjl]

If budget is an issue at the moment then I would buy two new ones for the rear.

Replace the fronts when they need it.

If budget is not an issue then as already said change all four.

 

[buck91]

The Mustang is an extra vehicle... just my prefered vehicle during nice weather

Anyways, she has 235/45r17 on all four at the moment, victim of a great craigslist deal a few years back. Its not so much that budget won't allow for new tires, its just hard to justify a new set when the car can just as easily sit in the garage for a while. I might try to find a tire similar to my extra michelin and run the 245 pair on the rear. Just was curious how close I want to get the nominal OD since most tires do vary between brands and models within a given size.

 

[Nick1994]

Just stick the new tire up on the front

 

[Johnny2Bad]

Originally Posted By: Nick1994
Just stick the new tire up on the front


ALWAYS run the tire with the most tread depth or if there is a difference, the stickiest compound, on the rear of the vehicle. NEVER run the new set on the front, regardless if the vehicle is FWD RWD or AWD.