Thread: Excellent Article on Tire Pressure from Officer.com
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Old 06-05-2008, 01:40 PM
Buzzbomb Buzzbomb is offline
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I'm don't think the article is wrong, but it's not totally right either. The tire's profile shape and width comes into play.

My skinny 185/65/14 stock tires on my old Civic sedan had a curved profile. Most performance oriented tires are pretty square.

I autocrossed my Civic sedan in HS for 2 seasons. I had to run high tire pressure to keep the tire from rolling onto the sidewall. The 2 highest worn areas were the center and the edge of the tire were the tread and sidewall meet.

With the tires natural curved profile and narrow width, pumping up the pressure put more load on the center. The effect is less pronounced or non existent with a stiff sidewall, wide performance tire.
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08' SSM Fit Sport - Best MPG: 47.04 / Worst: 33.25
00' Civic Si Turbo
02' WRX Wagon XPT Stage2

Last edited by Buzzbomb; 06-05-2008 at 01:47 PM.
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