Chart: Tire size for Wheel widths
 

These are the "ideal" size tires for a given wheel width. I realize there's a range or tires that will fit, but these are the "correct" size, I.E. not stretched.

Base
18 F: 8 | 225
18 R: 9 | 245

Sport
19 F: 9 | 245
19 R: 10 | 275

Nismo
19 F: 9.5 | 245
19 R: 10.5 | 285

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Aftermarket Tire / Wheel sizes for the 370 on 19's

9 = 245/40
9.5 = 265/35
10 = 275/35
10.5 = 285/35
11 = 305/30
11.5 =
12 =
12.5 =

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Suggestions welcome for the above.

Reped.

What about 20'?

9 = 245/40
9.5 = 265/35
10 = 275/35 ------> 285/35 -this should be more correct
10.5 = 285/35 ----> 305/30 -this should be more correct
11 = 305/30
11.5 =
12 =
12.5 =