Nitto 325/50r15

Nitto 555R's are an awesome street tire. The work as good as any wide tire in the rain, hook-up very well once the are a bit warm either from ambient temperature or a bit of spinning, and have a 186mph speed rating. It's the only 15" tire out there with that high of a speed rating, and they last for 10 to15k miles if you don't make smoke signals too.

They are not a good cold weather tire, however. If you live where there is snow and freezing for long periods, don't run them during those conditions.

I run mine with enough air to evenly wear off a 1" wide chalk line smeared across the entire tread from one side of the tread to the other. Depending on how much your car weighs, this can be as low as 18 psi.