lower tire press on 17?

I just picked up a 17 for a client in Ca and drive it an hour to Richmond from Fredricksburg va and noticed that the tire press monitor said pressure was 39-40 and thought it was low, my 14 I ran at 46-48 PSI for best wear and mileage,The door sticker on 17 says 38 PSI ????

Mine was delivered somewhere in the high 40's and thought it rode skittish. I lowered the pressure to spec and it smoothed the ride out a bit and felt more planted.

Cold, I run my 2017 SCREW with 38 PSI Front, and 37 PSI Rear.

Seems to have a good balance of MPG (16-ish mixed driving) and comfort. Also looks to have very even wear on the tires. I rolled 5,700 miles the other day and all four look brand new. Will be rotating at 7,500.

Perauto said:

I just picked up a 17 for a client in Ca and drive it an hour to Richmond from Fredricksburg va and noticed that the tire press monitor said pressure was 39-40 and thought it was low, my 14 I ran at 46-48 PSI for best wear and mileage,The door sticker on 17 says 38 PSI ????

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All tires are different in compound, sidewall construction, tread pattern etc and create different heat cycling and resulting pressure increase as you drive. 38 PSI cold is what the manual recommends, and what I’ve been running - unladen, that’s probably too much for the rear, but I haven’t messed with the pressures yet. My thinking is that 35-37 rear would be ok, but again, I haven’t messed with it.

Curious what the door sticker says on the 2017 Raptor?

JetDriver480 said:

Curious what the door sticker says on the 2017 Raptor?

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It's 38 psi cold

The GEN 1's were D rated and the truck was heavier. The lighter GEN 2 truck with the new C rated tires should have a sweet spot in the 35-40 range.

Thanks!