Hey guys looking to get a new set of tires soon. My 285s measure out to be a disappointing 31.5 on the h3. I'm upgrading to 315s soon and was wondering if yall had some actual tires size measurements and maybe some pics. I don't want to guy buy 315s and they end up being 32.5"s

 

The first number in metric sizing is the tire width in mm
265 = 10.43"
285 = 11.22"
305 = 12.10"
315 = 12.40"

The second number is the Aspect Ratio, expressed as a percentage of the width. This determines the outer diameter of a tire.

The last number is the Rim Diameter (in inches)


Here are the actual numbers (with slight variations between manufacturers) of properly inflated tires when NEW

285/75/16 = 285 x 75% = 213.75 x 2 (tire walls) /25.4 = 16.83" + 16" (rim) = 32.83" tire OD

315/75/16 = 315 x 75% = 236.25 x 2 (tire walls) /25.4 = 18.60" + 16" (rim) = 34.60" tire OD
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X2 on what bunger said.

 

Go to the tire MFG site, or a tire seller web site, and look it up for the precise total tire diameter when NEW and WITHOUT the weight of the truck sitting on them.

X3 what Bunger said.

 

Sounds like you are running a 265