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Old 07-06-2002, 02:11 PM   #3
sil80
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I asked a question on FA that I think belongs in this thread... gives a little detail.

Question -
Why would someone run larger tires up front? I have seen this a couple times on S13's.

16 inch JDM Buddy Club P1 wheels, rear 8.5 inches 245/45, front 7.5 inches 225/50 Sumitomo HTR-Z tires

Answer -
You have to realize that tire profile isn't an actual physical number -- it's just a percentage. The sidewall profile represents the height of the sidewall as a percentage of the tread width. So a 225/45 tire doesn't have the same height sidewall as a 245/45, even though they have the same profile.

To answer the question -- it's done because that's often the closest match in sizes between front and rear.

In your example -- a 245/45 has a 110.25mm tall sidewall, whereas a 225/50 has a 112.5mm tall sidewall. The next lower size for the front, 225/45 has a 101.25mm tall sidewall. The 225/50 is closer in diameter.

Asad
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