Tire Pressure
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Tire Pressure
Hi All
The sticker on the door jamb of my 2005 F250 says the tire pressure should be 75 lbs. The tires says 65 lbs.
What pressure is everyone using for daily driving without a load?
Thanks
Jeff
The sticker on the door jamb of my 2005 F250 says the tire pressure should be 75 lbs. The tires says 65 lbs.
What pressure is everyone using for daily driving without a load?
Thanks
Jeff
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Stock tires for an '05 F250 were E rated or 80 psi max. Sound like you've got D rated replacement tires on your truck. Depending on what engine you have, it will dictate front tire pressures. I run my E rated rear tires at 50-55psi while running empty. With a diesel, I run 65psi in the fronts, empty or towing.
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Hello c.f.
You are correct, they are LT285/70R17 load range D , B.F.Goodrich All-Terrain T/A , replacements.
My engine is the 5.4 gas. Right now I have all the tires at 65psi. So I should let some out of the back with no load?
Thanks
Jeff
You are correct, they are LT285/70R17 load range D , B.F.Goodrich All-Terrain T/A , replacements.
My engine is the 5.4 gas. Right now I have all the tires at 65psi. So I should let some out of the back with no load?
Thanks
Jeff
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From: Colorado foot hills
Go with the max rating pressure on the sidewall, when the tire is cold, of course! If you go with the door jamb, you will over inflate and risk a blow out when the tire gets up to temp.
jammer
jammer
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From: Goldsboro, NC
...If you go with the door jamb, you will over inflate and risk a blow out when the tire gets up to temp.
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From: Colorado foot hills
jammer
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Your reply was an even bigger waste
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From: Colorado foot hills
maybe i had that comming, but not from a moderator!
BTW, hard tires give better fuel mileage (reduced rolling resistance), steel belts usally hold the tread flat, so wear is probably minimal when running at recommended max pressure. Ford and others run tires a little on the soft side to reduce ride harshness - effectively using the tire as additional spring in the suspension. But, then again, I'm sure you already knew all of that.
jammer
BTW, hard tires give better fuel mileage (reduced rolling resistance), steel belts usally hold the tread flat, so wear is probably minimal when running at recommended max pressure. Ford and others run tires a little on the soft side to reduce ride harshness - effectively using the tire as additional spring in the suspension. But, then again, I'm sure you already knew all of that.
jammer
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It was a somewhat inflammatory response to a comment, which we don't need. Don't take it personal, just remember next time you see someone (like me, for instance) wasting bandwidth, ignore it.
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Flag the post (little triangle icon in the upper right corner of every post) as a flagrant waste and let the moderators handle it.
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Who else do you expect to step in and stop a looming flame/pissing contest?
There is a time-honored test of tread contact, using chalk draw some lines across the tread. Then, on a flat piece of asphalt/cement, roll back and forth a few times.
If the chalk wears off evenly across the tread, you have good contact.
Filling the tire to the max without being at full load will cause the center of the tread to extend out past the sides and WILL cause the center of the tread to wear away much faster than the outer edges. The chalk test will show the center of the chalk line worn away, but the edges will not. That's with a brand-new tire - if you're running at max for a long time, you've already worn the tread flat and it's a non-issue.
It also helps in stopping and starting, especially in wet situations to keep as much of the tread in contact with the road.
Originally Posted by jermort
BTW, hard tires give better fuel mileage (reduced rolling resistance), steel belts usally hold the tread flat, so wear is probably minimal when running at recommended max pressure.
If the chalk wears off evenly across the tread, you have good contact.
Filling the tire to the max without being at full load will cause the center of the tread to extend out past the sides and WILL cause the center of the tread to wear away much faster than the outer edges. The chalk test will show the center of the chalk line worn away, but the edges will not. That's with a brand-new tire - if you're running at max for a long time, you've already worn the tread flat and it's a non-issue.
It also helps in stopping and starting, especially in wet situations to keep as much of the tread in contact with the road.
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Load Range
Thanks, was just curious about the lower range tire.
Its no big deal if you are not towing/hauling @ near capacity. In my case LR D would probably get me in trouble as I regularly tow near the limit. The previous owner probably found out that LR E in that size is pricey.
DG
Its no big deal if you are not towing/hauling @ near capacity. In my case LR D would probably get me in trouble as I regularly tow near the limit. The previous owner probably found out that LR E in that size is pricey.
DG