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Old 03-12-2011, 10:12 PM   #109 (permalink)
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Originally Posted by htvfd460 View Post
It will increase by the diameter's difference. My tires are about 27.5" at 28 psi. Setting the pressure to 35psi expands my (center tread) diameter to 29". My tires change by 1.5".
...I'll bet that was an "unloaded" diameter change, not the "actual" change (which is much smaller) when loaded, ie: the tires' "flattened" foot print.

...typically, there's a 3% reduction in diameter between unloaded and loaded conditions.
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