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Free tires: how far off is 185/75/14 from 185r14? 200 1988

posted by  zrubin on  Tue Apr 26 03:57 CST 2005
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last visit: Thu Sep 20 15:45 CST 2012
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185R14 (actually 185/82R14) gives a wheel/tire diameter of 25.94 inches
185/75R14 gives a wheel/tire diameter of 24.93 inches
Circumference is 2*pi*radius, and the difference in radius is 0.505 inches
0.505 is about 4% of the radius of the original size tire, so your speedometer should read 4% higher than actual.

Zack
1980 245DL M46 275k
1985 744TD M46 251k
1988 745T+ M46 203k






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New Free tires: how far off is 185/75/14 from 185r14? [200][1988]
posted by  Bonzo  on Tue Apr 26 02:48 CST 2005 >


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