When I got the car (bought it used), it had these tires on with about 7/32'' on the fronts and 5-6/32'' on the rears. I've heard that mismatched tires are a bad idea in general, but considering I don't track the car at all, and only do a bit of occasional spirited driving, is this bad for the car (especially since the fronts are all-season and the rears are summer)?

I don't really have complaints about the handling, but will this hurt the car in the long run? It doesn't seem like it should, but just wanted to make sure.

Thanks.

 

Just realize that the front and rear tires dont have the same level of grip and you should be fine. It would actually perform better in the dry, since it'll cause understeer instead of oversteer, but in the rain you should watch out.

 

Those are a really bad mix. The GT is an all season tire and the S Drive is a summer performance tire. In an emergency situation the car is not going to handle well at all.

 

So considering the tires are both not quite dead yet, should I just wait until I get new tires, or is it imperative that I change them as soon as possible?

 

It wont perform any worse than a car on all four all-season tires.

 

ha ha this is almost the same setup I have expect there F1's in the front - the front has mild under steer at the limit which is probably a good thing if you just bought it and are driving in the rain.

Both tires are fine with factory alignment if your heavily toed or cambered either fix it or opt for a different tire like the azenis