My tires say P235/75R15 on the side of them.. i need to get 4 new tires coming up here pretty soon and I wanted to know if that's the number i needed to look for when getting new tires. I am going to try to get them on ebay to save about 100$. My tires make too much noise and I'm gonna need some new ones shortly anyways.. Do you guys have any suggestions on where i can get some quality - yet somewhat inexpensive tires?? thanks!