tire diameter with more sidewall is the only way tires will get you more comfort. it's a modest gain but is there.I have a 2024 MYLR with 19" Geminis wearing OEM 255/45R19s. I'm looking for comfort.
There are some takeoff M3 Highland Photons with 235/45R18 Hankooks available.
That seems like just less tire. I can imagine it might be more efficient but definitely less comfortable.
So is the only way to get more comfort by swapping down to an 18" rim getting new bigger tires as well?
you have about 3/4" (measure from your tires to the steering knuckle) to play with in terms of how much taller a tire can be over the MY stock 255/45/19.
that can be done using 18" wheels as well, but be sure they clear the MY rear brake calipers (front is not a problem).