What’s the universal PSI in car tires?

I know you have to look inside the door for your cars details, but I’m kind of skeptical of my car (2008 Toyota Yaris) due to the fact that there were a few owners before me and I’m not sure if one of them changed the tires to be something different. Is it tailored to the weight of the car? Or is it the shape of... show more I know you have to look inside the door for your cars details, but I’m kind of skeptical of my car (2008 Toyota Yaris) due to the fact that there were a few owners before me and I’m not sure if one of them changed the tires to be something different. Is it tailored to the weight of the car? Or is it the shape of the tire? I don’t know man haha.
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