I'm not an automotive engineer ....... but I did stay at a Holiday Inn once .......
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the 29 psi rating will provide optimum comfort ........
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plus ..... the 29 psi is a *cold* measurement .... 29 psi cold may mean 32 psi when the tire is up to operating temp ....
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also, the 29 psi recommendation may actually lessen the chance of rollover ....... higher psi may actually lead to increased traction and therefore increase the chance of rollover in the event of a emergency manuever (think Ford Explorer - Ford recommended low psi to reduce the chance of rollover - but Firestone countered the low psi could contribute to tire failure ...)
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I can not remember the last time I kept tires as low as 29 psi - the tires wore unevenly (on the outsides) and the handling (cornering) sufferred. In addition, cupping on vehicles with 4wd was more likely to occur.
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