Question on tire pressures
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Joined: Nov 2019
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Question on tire pressures
Just picked up my 19 Ranger XLT yesterday.
It has Hankook 265 60 18 tires.
All the tires are set at 45psi. The door sticker says 30. Should I set them at 30 or am I missing something? I am not towing or carrying a heavy load in the bed.
It has Hankook 265 60 18 tires.
All the tires are set at 45psi. The door sticker says 30. Should I set them at 30 or am I missing something? I am not towing or carrying a heavy load in the bed.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
Welcome to FTE
i'd be setting them a lot closer to 30, were it mine. Excessive tire pressure just beats the hell out of the bearings. If you're haulin' a load of gravel to KC or something that's one thing.
i'd be setting them a lot closer to 30, were it mine. Excessive tire pressure just beats the hell out of the bearings. If you're haulin' a load of gravel to KC or something that's one thing.
Laughing Gas
Joined: Aug 2003
Posts: 1,175
Likes: 9
From: So. Cal.
My tires were running at 50 psi when I took delivery. I was wondering why the bumps were hammering the suspension!
It sure rides a lot nicer at 30 psi. I wonder how many sales are lost when test drivers decide that the demo truck just rides too hard. I don't think the truck has the weight capacity to ever justify running 50 psi.
It sure rides a lot nicer at 30 psi. I wonder how many sales are lost when test drivers decide that the demo truck just rides too hard. I don't think the truck has the weight capacity to ever justify running 50 psi.
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
I read somewhere, don't know how true it is, max GVW doesn't change with tire pressure. That's not to say ya don't want to air up with a heavy load, don't misunderstand, they get squirrely. But the actual load rating of the tire itself is @ say 35 lbs. Airing up to 44 or whatever, doesn't change this.
Logistics Pro
Joined: Jul 2006
Posts: 4,512
Likes: 18
From: Detroit
Cars and trucks usually leave the factory with excess air pressure. I've had new vehicles that were supposed to be at 30-33 lbs delivered with 45-50 lbs. The reason that the factory does this is to allow some air to bleed off if the vehicle is not sold for months. And, maybe more importantly, it keeps the tires from flat-spotting in long term storage....flat spots also make for a bad test drive experience.
That said, it seems like dealers really should lower the pressure before delivery, and they seem not to do this. I do like 3-4 lbs over the mfr recommendation, usually, but not 10 or 15 lbs.
George
That said, it seems like dealers really should lower the pressure before delivery, and they seem not to do this. I do like 3-4 lbs over the mfr recommendation, usually, but not 10 or 15 lbs.
George
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Ideal tire pressure is whatever produces the fullest tire contact patch with the current or typical load, this will also produce the best traction and longest tire life. With a pickup I often ran the rears 10psi lower than the fronts and only aired up when I was planning to haul something, I could do the same with my cargo van but I haul stuff often enough it would be a pain to maintain so I just leave them at the same pressure as the front.
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