2003 Lexus ES 300, 3439 pounds weight, 61 to 39 front rear weight ratio. Factory wheel/tire size is 215 60 R16. The door sticker says 29 psi both front and back. My new wheel/tire size is 225 45 R18. What should my front and rear psi be?
Thanks very much. Tire pressure is confusing for me.
After running 2 calculations mentally pertaining to the width and contact patch. I would recommend between 26 to 28 PSI. Try this range and let the one which feels normal remain. If I had to bet, I would lock it on 27 PSI. But you be the judge of your comfort. And do monitor the sidewall.
*I will await results from other senior members, until then delay my initial recommendation.
Conventional way would require you to add 33 to 36 PSI on this new setup. In my experience it gives more of a center patch lock, high speed cornering would cause moderate slip.
