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Tire Width Question

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Why is my stack of 235/45/17 half an inch shorter than the stack of 215/55/16? I measured with a straight edge across the top.

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Why is my stack of 235/45/17 half an inch shorter than the stack of 215/55/16? I measured with a straight edge across the top.
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00' E320, 03' E320T, 05' C230K
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Discussion Starter · #2 ·
From my calculation, 235 should be approximately 18.5" and 215 should be 17". Actual measurements for 235 is 17.75" and for 215 is 18.25" (measurements has not been inversed).
 

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00' E320, 03' E320T, 05' C230K
Joined
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5,298 Posts
Discussion Starter · #7 ·
I knew there was a variance between stated and actual size. What I didn't expected was the stack of 215 tires being significantly wider than the 235.

The 235 width is .375" smaller (each tire) between calculated and actual. For the 215, it's .625 wider. Combining the two explains the half inch difference between the two stacks :)
 
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