Tire pressure stays the same no matter what tires you put on. PSI is based on weight of the vehicle. Larger tire may take more air volume, but not pressure. Follow the recommended psi on the sticker in driver's door area.

Unless you made a drastic change in the tire size from OEM the recommended PSI remains the same.

Check owners manual

Max PSI is cast into tire sidewall.

Hello,

I own a Mazda 3 (2007) and I recently changed my original tyres to a new set with different size. Kumho KH17 215/50/17. I want to know if I should follow the pressure information in the sticker on the door, or if I should use a different poundage (psi) for the new size tyres.

If that's the case, how can I know what pressure should be in the tyre?

Thanks!