The two front tires have worn prematurely I have had the car aligned, balanced and also rotated the worn tires to the rear. they are not worn dangerously bad but the front drivers side worn on the outside and the passenger worn on the inside. Anyway the two rear tires still look brand new no more than 5-6k on these tires. Do I have to buy a full set or can I just buy two to replace the worn ones?

 

You can get away with two minimum of the same make/model/size.

 

As long as you're running the same sizes all around *as you should on this car* , you should be able to get away with replacing 2 and rotating them every 2 oil changes to extend the life of the tires.

 

Yeah definitely keep your two good tires and just replace the two tires that are worn.

 

Are they worn in the center or just on the edges? If the centers of the worn tires have the same tread as the centers of the good tires, the diameters should be the same.