Thats a crazy amount of pressure just to drive around town. If your light is going on when the rear hits 70 psi. I was gonna lower mine in the rear but if the light comes I wont.
I disabled my TMPS with my bullydog before I sold it, so know more warning messages popping up on my display. But the little warning light stays lite, I just got used to it over time. I keep mine at 65 front and 55 rear unless I'm towing heavy.
I am pretty sure the law requires the alarm to occur at 25% below the placard pressure. But Ram appears to have taken the safe route with 20%. 80psi --> 64 psi alarm pressure. I had my TPMS pressures changed to 60 psi all around so I now get the warnings at 48 psi. I am sure mine never alarmed at 70 psi before I had it reprogrammed. I have been running 65 psi in front and 55 psi in the rear almost from day one, even with the warning and light (before I had it reprogrammed). It is still too much for running empty but it gives me the ability haul or carry a load whenever I need to. No way was I going to run full-load tire pressures in the rear just because some stupid light on the dash was lit up.
I run 55F/50R (when empty) and deal with the stupid light and warning message. I'm close to making a cutout like Terb showed above - downright silly that is even a thought on an expensive truck.
Anyone here have 22" wheels on 35" tires, what kind of PSI do you run?
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