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It depends on th construction of the tire generally. For instance the Dunlop Star Specs have very stiff sidewalls for a street tire. The Hankook RS3s do as well but not like the Star Specs. One datapoint is in the STR autocross class which is limited to 17x9 wheels S2000 guys at the top ran 255 Star Specs. The 245 has a little crisper turn in but doesn't have the ultimate grip of the 255.
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