RE: Tire size

From: Frank Johnson (frankwjohnson@hotmail.com)
Date: Wed Dec 01 1999 - 12:55:27 EST


Ya i didn't really make that part clear enough i guess. But if you read the
rest it explains that it's just the rubber, not the space where the rim fits
in.

Frank WJ

>From: "Barret, Matt" <MATT_BARRET@earthtech.com>

>65 percent of 255 is the HEIGHT of one side wall NOT the radius, radius is
>this dimension plus half the wheel diameter! If we are speaking of the
>late
>model 15X8 rims with 255/65/15 tires than the total height would be
>165.75mm for each side wall (top and bottom) plus the rim Diameter of 15"
>or
>381mm so total height would be 712.50mm or 28.0511 inches!!
>Matt
>
>-----Original Message-----
>From: Frank Johnson [mailto:frankwjohnson@hotmail.com]

>The 255 that you refer to is the widthin millimeters. The second number 65
>is the percent of the sidewall of the first number--255. So you have
>255/65, which means that 65 percent of 255 is the radius of one sidewall.
>Quick math:165.75 mm. So your sidewall is 167.75 mm from the outside of
>the tread to the point that the tire comes in cantact with the rim.

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