I have Dunlop SP8000 245/50X15 on the 7" wide Campy wheels for street and Hoosier 245/45X15 on the 8" wide Campy wheels for autocross.
Make sure your steering rack is centered properly. I finally figured out that the reason my right front rubs the inboard side on the rear of the wheelhouse with the Hoosiers is because I can turn farther to the right than I can to the left. I can spin the steering wheel about 600 degrees clockwise from center, but only about 510 counterclockwise. One more thing to fix.
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