When we got the car, it still had 4 winter tires on it, but she had a couple extra summer ones. Anyway, we bought Kumho Ecsta Supras (712s i think) yesterday and got them put on the front, and got the old summer ones (goodyear something or other) put on the back and ever since, the car has been pulling sharply to the right. The Kumhos are directional and the Goodyears aren't. I didn't measure the tire pressure, but they all look even. Is this a tire problem, or are we gonna need a 4 whl alignment?