9" is the narrowest rim that a 265 cup can be used on, same with a 250 slick, both suggest 9-10.5 inch wheel. A 250/640/18 Dunlip slick is 10.1" wide, it is designed for a 9.5" wheel. I've had good discussions with the tyre and wheel people about the issue of the car falling over itself as the tyre tucks under and the consensus was to go to a wider wheel to stretch the sidewalls and reduce the wheel moving inside the tyre hence my suggestion of a 10" wheel. My car is heavier than the cup cars so horses for courses and not suggesting what you've found isn't right, just different to what I've seen on my car.
Nick bell ran 18x10 BBS and later OZ on his car to great effect, worth having a chat with him?
I've got some 18x10 team dynamic 1.3s waiting to go on, fingers crossed my offset calculations were right :D
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30-10-2009, 03:01 PM
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