What size tire is the same size as a 33?
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12-09-2009, 02:46 AM
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What size tire is the same size as a 33?
ok guys i was just wondering what size tire is the same as a 33 right now im running 33x12.50's would the same height be 285's or bigger i have lift blocks on the back and 2 1/2 inch coil spacers up front what size tire could i go with so i wont have such a big gap in my wheel well
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12-09-2009, 07:32 AM
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12-09-2009, 07:52 AM
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12-09-2009, 11:46 AM
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The only difference between a 285 and a 305, is width.
#9
12-09-2009, 12:05 PM
Its a stupid measuring system but its not complicated... just involves simple math.
The first number is the section width (widest part of the tire, not tread width or rim bead width) in millimeters. The second number is the aspect ratio, which is the section height divided by the section width. So to find the section height, you multiply the section width (the first number) by the second number as a percentage. The third number is the rim diameter in inches.
So as an example, lets go through the 305/70/16:
The section width is 305mm, so divide it by 25.4 mm per inch and you get 12.00 inches.
The section height is 12.00 inches times 70% (or .7), so you get 8.4 inches.
The rim diameter is 16 inches.
To find the total diameter, you have to count the section height twice (above and below the rim) and the rim, so you get 16+(8.4*2)=32.8 inches.
FWIW, a 315 is a 12.5 inch wide tire.
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12-09-2009, 12:11 PM
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