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...thanks for the corrections. I see now that the TRA Load Index (LI) number is specified at 35 psi (for passenger tires), not at the tires sidewall "maximum" value (44 psi for this tire).
...however, because many people here are talking about running their tires at the maximum sidewall pressure, the "approximation" is both valid and useful for "estimating" how tire pressures vary with load.
...and, yes, the relationship between the Load Index number and weight isn't linear, it's actually an exponential function that is roughly:
LI = 35*LN(lbs) - 159
Last edited by gone-ot; 05-06-2010 at 02:13 PM..
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