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Old 07-21-2011, 11:34 AM   #6
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Originally Posted by fighing2succeed View Post
I'm pretty sure that Ian said that he ran the 225/45 Hoosiers.
That is bewildering. I can't imagine why anybody would run the 225/45/17 on an HS SVTF. Seems pretty clear to me that is is the worst choice of the three sizes. Maybe they were on sale?

Size              Price   Tread    TR Diam    Calc Diam
225/40ZR17   $257    8.9"      23.8"        24.09"
225/45ZR17   $257    8.8"      24.7"        24.97"
245/40ZR17   $266    9.3"      24.5"        24.72"
Edit: The diameters listed on TR for these Hoosiers do not match the calculated diameters for the printed size. I added a column to the above table to show the differences. This sort of thing is common with racing tires; even street-class autocross tires are often wider and shorter than their calculated sizes. For example, the calculated diameter for a standard 215/45/17 is 24.62", which coincidentally rounds to the same 24.7" that TR lists for the 225/45/17 Hoosier A6.
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