2010 RX350 very rough ride - suggestions

[Spotyou58]

It is 13 yrs old and 129,000 miles and our vehicle rides really rough. We have 17” tires and reduced the air pressure to 32. We have not changed any suspension parts. Its bad enough riding up front and with family visiting recently found out the back seat is much worse. Any thoughts would be appreciated.

[Bd3max]

What I've done with my 2015 Rx350 was to go up a size in the "aspect ratio" of the tires. I went from a "60 series" to a "65" and gained 1" of total height= 1/2" more height of each sidewall- the more you have, the more "give" there is over bumps- also keep the PSI around 31. And I researched and finally picked new tires that excelled in ride comfort(according to TireRack testing) Also the bigger size has no clearance issues. I'm happy now.