Scotty, I really appreciate your videos, you have been a great help to me through the years. I do have a question that I haven't seen you answer before. When you change tires on a vehicle to other than what came on it, for instance it came with Good-Year and you change to Michelin's and the max tire pressure on the sidewall is different on the tires, do you use the air pressures on the door pillar or the new tires? Thanks in advance for your recommendations!
Brands mostly don't matter as the max psi you will never get to on most passenger cars. The difference is when you get a differet aspect ratio. For example a P225/75R16 was your old tire and your new tire was 225/65R16 is when the tire pressure matters to change kinda. As long as the tire was on your recommended or whatever then just go ahead and follow what's on the door.
Aren't tires of equal size designed to carry about the same load? There will be differences in rubber compounds to get more miles per tire. There are other design features for speed and or rock crawling. But the weight capacity of a tire of equal size are close enough to carry the same weight car regardless of maker.
Even when wearing factory tires or "off brand" I watch how tires wear and adjust pressures accordingly. When sidewalls sag I pump more air. If tread center wears I lower pressure. Since I think tires and tire pressure are more about drivers than vehicle I pay more attention to what really happens as I drive. Every suggested PSI on cars and tires are only suggested starting points. The end pressure is up to you.
