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Message: <blockquote data-quote="Boss Hoss" data-source="post: 545718" data-attributes="member: 4168">Wilson--No Big Deal LOL!  When replacing tires always go with as a rule of thumb a load rating equal to what will be required for your vehicle. Example of not doing this would be to run a load range d tire on a 1 ton truck. This will be fine if you NEVER haul a load that would need Load Range E tires. My comment about tire pressure was made from numerous discussions with both our engineers and those of a couple of our main suppliers Goodyear and Michelin about this subject. Somewhere I have an email from years ago where the chief design engineer in passenger car truck tires answered my question and through my guy with Goodyear North America Aviation that as a rule a tire should not ever be run on the highway or improved roads at more than 20% less than the max cold psi on the tire (heat issue on the sidewall among other things). Yes there is caution built into that number but as a general rule I follow that on trucks. On my jeep I do not because those tires are 85 psi and I run 45 in them because of the weight and they DO Not Flex in fact they are probably still overinflated for best performance. Use those because they are the best solution for my sidewall issue at the ranch.</blockquote>