Just wanted to post and say thanks to Jeb for all the effort. The newest tire (either 3rd or 4th we've tried; I lost count) doesn't pull like the first and second (& 3rd?) did. It does make the STi pull very slightly if it's on the front, but I think it's because of tread depth & LSD action at this point. I put the wheels and tires on the 2.5RS & put the new tire on the left front so that it would hopefully even out eventually without rotation - that's the quickest-wearing corner. (and the open front diff doesn't cause the car to pull to that side at all)
So now I need another set of tires for the STi... with matching diameters.
