[Mark Brye]

Not all tires are created equal with respect to width as advertised. My 315/35/17 Goodrich F1 D3's are the same width as my 335/35/17 PS2s. My 335/30/18 PS2s are almost 1/2 inch wider than the same tire in 17s. My Kumho XS 315/35/17's are a good inch narrower than the F1s in the same advertised size.