Yes all settings are set to use on highway
last 3 2024 Nissan Frontier Pro4 X
See if maybe your wheels aren't proper balanced
My 2019 came with 50psi, dealer didn't check it. When I did a level lift and new shocks, uca's and went up to 285 70 17 WildPeak tires i started at 40 psi (I ran 40 in my take home police car with all of my regular gear plus allergy of my scuba gear it handled perfectly) but 40 was a bit hard on my back after a while so I lowered to 35 psi cold and it was alot more comfortable. I have a bad back, 3 surgeries including 2 total disc replacement's and ablations and 2 total knees. I feel your pain. Although my 19 was as close to a RR as I wanted to get, the test drive in the 2025 RR on my local daily driven streets with all of the bumps, it rode better than my 19 Lariat and better than my wife's Lincoln MKX! I don't know what psi was set at and I didn't think to see what settings the steering was set at from the factory, I don't recall seeing a 4H icon lit up. I would try 35psi cold, 2H, and different modes, normal, sport etc, leaving your seat at a preferred comfort setting and drive the same roads for a day before you make changes. I had just had my 1st (right) knee replacement before I retired so I was on desk duty driving my 19 Ranger back and forth to work at the Sheriff's Office, only 10 minute's but I couldn't get comfortable at all for a while. An hour drive to deer camp was a killer but after my knee, back and hips learned to get along it was much better. I did have a coccyx seat cushion and an added lumbar pillow, the oem lumbar didn't hit me in the right spot post op.
I
It rides worse than a Frontier?...yeah, there is a problem with your RR. Sounds like a trip to a trusted dealer is in order.
Is the vibration constant, vary with speed or vibration only at certain speed? Also do you feel in the steering wheel or the seat or both? Just asking as they will help the mechanic pinpoint the source.
