Quote:
Originally Posted by TexasCotton
I am going to restate this (sorry) The recommend inflate psi is like 38psi. tire sidewall rating is 45psi. My concern is once you go into the higher psi range is a blowout at interstate speeds..........
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The recommended pressure by the car manufacturer is set at a pressure that promotes certain handling characteristics and ride comfort. It has little to do with the tires limit. They want to have a soft ride and promote understeer.
The maximum sidewall pressure isn't really a tires pressure limit, more of a lawyers safety limit. If you search youtube for exploding tire, you will see people pumping up old tires to 150+ PSI before they burst. If that isn't enough evidence, we have many members who have run 60 PSI for tens of thousands of miles, on multiple sets of tires, without any issue.
With all that cleared up, the data generated by ABA testing from MetroMPG reveals that the benefits from increase tire pressure start to taper off after 50 PSI.