tire size
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Joined: Feb 2012
Posts: 213
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From: Manchester CT
Year: 87
Model: Cherokee
Engine: 2.5 4 banger
Its not that hard to convert with a calculator, metric sizes mean (section width/aspect ratio rim size) in mm.
Aspect ratio is the sidewall hieght as a percent of the width.
For instance, a 265/75r15 tire would be...
265x.75=198.75 (height of sidewall in mm)
198.75x2=397.5 (double sidewall hieght to figure for diameter)
397.5/25.4=15.64 (convert from mm to inches)
Add rim height 15.64+15=30.64
So that tire has a diameter of 30.64 inches, plus whatever the tread depth is.
Aspect ratio is the sidewall hieght as a percent of the width.
For instance, a 265/75r15 tire would be...
265x.75=198.75 (height of sidewall in mm)
198.75x2=397.5 (double sidewall hieght to figure for diameter)
397.5/25.4=15.64 (convert from mm to inches)
Add rim height 15.64+15=30.64
So that tire has a diameter of 30.64 inches, plus whatever the tread depth is.
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