P. A. Schilke
Well-Known Member
- First Name
- Phil
- Joined
- Apr 3, 2019
- Threads
- 141
- Messages
- 7,012
- Reaction score
- 36,169
- Location
- GV Arizona
- Vehicle(s)
- 2019 Ranger FX4 Lariat 4x4, 2020 Lincoln Nautilus, 2005 Alfa Motorhome
- Occupation
- Engineer Retired
- Vehicle Showcase
- 1
Hi Steve,Soooo. When I aired my tires "down" today I noticed that they were aired up way over the 30 psi recommended on my door sticker. I actually aired down to the recommended 30 PSI and after being on the beach I had to drive on pavement to find a safe spot to air back up. OMG the difference in the ride was tremendous. At 30 PSI the truck felt soft, and bouncy, and dangerous. I'm only posting here because we were talking about the soft ride but I hadn't experienced it until today because my tires were aired up so high. Needless to say I aired them back up to 45 psi. I'm curious as to why they would only recommend 30 psi in these tires when Max on the tire itself says 51 psi.
All Ford Vehicle dynamics evaluations and tire wear testing was done at 30 psi. The Max tire inflation is just that, the Max. This is not the OEM pressure. You do not indicate your vehicle, its tires or 4x2 or 4x4 etc so cannot comment more than it is not recommended you run your tires above OEM recommendations. Your dealer did not adjust tire pressures as he is paid to do in pre delivery. If you have an FX4, then you bought an offroad package where on road is a bit softer than the STX. FX4 shines off road...
Best,
Phil Schilke
Ranger Vehicle Engineering
Ford Motor Co. Retired
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