rlh6805
Michigan
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willald wrote:rlh6805 wrote:mowermech wrote:There are a lot of people who don't agree, but I would look at the specification sticker on the door jamb, and use the pressures stated there. There also should be an inflation chart in the Owner's Manual that goes into more detail about what pressures should be used at what load.
IMO, the MAXIMUM pressure stated on the tire sidewall is for the MAXIMUM rated load of the tire, ONLY. For any load lighter than that, you can have a corresponding decrease in pressure. If you run the tires at maximum rated pressure, with a light or no load, you will wear the center of the tread out. You want a tire pressure which will allow the tread to lay flat on the road surface, and wear evenly all the way across.
Just my opinion, of course, others will disagree, some quite vehemently.
FYI, I am a retired mechanic. At one time I was trained and certified (military and civilian) for demounting and mounting tires on multi-piece wheels (split-ring, snap ring, and bolted, truck, industrial equipment, and aircraft).
Sorry, but I need to clarify why I cannot do this. The original tires on the Ex were D load 65 psi tires. These were recalled by Ford and replaced with E load 80 psi tires. The owners manual and the door sticker both relate to the original D load tires and therefor cannot be used for information.
Amen to that. Our Excursion fortunately came with BG Goodrich Load Range E tires, but the (worthless) sticker had numbers based on D tires.
Of course, dealer knew no better, and had the lower pressure (as on the door sticker) in the tires. The first thing we did to the Ex, the same day we brought it home, was air up all 4 tires to around 70 psi. that improved the ride/handling SIGNIFICANTLY, was very noticeable. And, after 5+ years of use both towing and non-towing...I see no uneven wear in the tires at all. They are all wearing very evenly, and after 48,000 miles, still have a good bit of tread left on them.
Soo, anyway, you're on the right track, airing up those E load tires. The Ex in particular, seems to ride better when you put 'bout 70-75 psi in the tires.
Thanks for that. 70 psi seems to be the sweet spot for tires on the Ex. For those that do not have one, the Ex is a much heaver vehicle than any PU or SUV out there.
Rob and Cindy in Michigan
2004 Prowler Regal
2001 Ford Excursion V10 4x4
Tasha, Deanna (RIP), and Abby (our dogs)
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rlh6805
Michigan
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I looked up the curb weight ratings for the EX, V10 4x4. I'd attach the file, but this crappy forum SW that we have to use here doesn't allow for posting attachments....
Front = 3,575 lbs
Rear = 3,615
Total = 7,190
So the rear DOES weigh more than the front when unloaded.
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chadsalt
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rlh6805 wrote:chadsalt wrote:
Don't you mean info that agrees with your already made decision to run the tires overinflated?
And does the back end of a X weigh more than the front when empty, or am I missing something?
Why am I running my tires overinflated? Overinflated would be exceeding the 80psi rating, I am not doing that. My Ex almost exclusively used for towing in the summer months, I do not care to constantly air up and down the tires.
Why are you running them overinflated? I dont know. Overinflated as in "more than necessary".
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chadsalt
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cenley wrote:And does the back end of a X weigh more than the front when empty, or am I missing something?
The back of my Ex weighs about 75lbs more then the front when empty - thanks.
Carl
Right about what I expected, so why are you running almost 15% more air in the rear?
Ive been known to run 60F and 45R on my Dmax, if it actually moves more than a few feet without a trailer, but there is a somewhat more drastic weight diff there.......over 1000#, not 75# little pounds.
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up2nogood
Utah
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rlh6805 wrote:willald wrote:rlh6805 wrote:mowermech wrote:There are a lot of people who don't agree, but I would look at the specification sticker on the door jamb, and use the pressures stated there. There also should be an inflation chart in the Owner's Manual that goes into more detail about what pressures should be used at what load.
IMO, the MAXIMUM pressure stated on the tire sidewall is for the MAXIMUM rated load of the tire, ONLY. For any load lighter than that, you can have a corresponding decrease in pressure. If you run the tires at maximum rated pressure, with a light or no load, you will wear the center of the tread out. You want a tire pressure which will allow the tread to lay flat on the road surface, and wear evenly all the way across.
Just my opinion, of course, others will disagree, some quite vehemently.
FYI, I am a retired mechanic. At one time I was trained and certified (military and civilian) for demounting and mounting tires on multi-piece wheels (split-ring, snap ring, and bolted, truck, industrial equipment, and aircraft).
Sorry, but I need to clarify why I cannot do this. The original tires on the Ex were D load 65 psi tires. These were recalled by Ford and replaced with E load 80 psi tires. The owners manual and the door sticker both relate to the original D load tires and therefor cannot be used for information.
Amen to that. Our Excursion fortunately came with BG Goodrich Load Range E tires, but the (worthless) sticker had numbers based on D tires.
Of course, dealer knew no better, and had the lower pressure (as on the door sticker) in the tires. The first thing we did to the Ex, the same day we brought it home, was air up all 4 tires to around 70 psi. that improved the ride/handling SIGNIFICANTLY, was very noticeable. And, after 5+ years of use both towing and non-towing...I see no uneven wear in the tires at all. They are all wearing very evenly, and after 48,000 miles, still have a good bit of tread left on them.
Soo, anyway, you're on the right track, airing up those E load tires. The Ex in particular, seems to ride better when you put 'bout 70-75 psi in the tires.
Thanks for that. 70 psi seems to be the sweet spot for tires on the Ex. For those that do not have one, the Ex is a much heaver vehicle than any PU or SUV out there.
????????? My Ford Superduty CC SB is nearly 700 lbs. heavier @ 7880 lbs than the EX. The long beds are even heavier. I am not sure how you came up with that conclusion.
As far as air pressure its hard to understand how that light of vehicle can ride good or better as you say with 70+ psi. You are slightly heavier than the superduty in the rear and lighter in the front. IF I run 70-80 when empty I can't begin to tell you how rough it rides empty, and as far as I am concerned does the truck no good to ride that hard. I have no desire to see how tight all the bolts are in my truck. Like you said I don't have an EX, but you have with E rated tires ,I don't know your size roughly from 3200-3750 lbs rating for a total of 12800-15000 lbs total carrying capacity distributed on four tires. You are roughly using about half the tire rating.
* This post was
edited 09/22/08 04:03pm by up2nogood *
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rlh6805
Michigan
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up2nogood wrote:
????????? My Ford Superduty CC SB is nearly 700 lbs. heavier @ 7880 lbs than the EX. The long beds are even heavier. I am not sure how you came up with that conclusion.
Sorry about the miss quote. I do realize that the Ex isn't the heaviest vehicle out there, but I think the key is that it is heaver in the rear.
up2nogood wrote:
As far as air pressure its hard to understand how that light of vehicle can ride good or better as you say with 70+ psi. You are slightly heavier than the superduty in the rear and lighter in the front. IF I run 70-80 when empty I can't begin to tell you how rough it rides empty, and as far as I am concerned does the truck no good to ride that hard. I have no desire to see how tight all the bolts are in my truck. Like you said I don't have an EX, but you have with E rated tires ,I don't know your size roughly from 3200-3750 lbs rating for a total of 12800-15000 lbs total carrying capacity distributed on four tires. You are roughly using about half the tire rating.
Again, it is heaver in the rear which is what is going to be the determining factor to a rough ride. I ran my Revo's at 65/75 for years while towing the TT, and the tires wore very even (they just wore out fast!!). I think after much thought and good advise here that I am going to stick with what worked for me (65/75). Of course in the winter I will air them down, probably to 55/65 (this is also what I did with the Revo's).
Thanks to all for the good posts!! I can always count on everyone here to quickly answer questions and provide a good debate!!
Cheers!!
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willald
NC
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up2nogood wrote:rlh6805 wrote:willald wrote:rlh6805 wrote:mowermech wrote:There are a lot of people who don't agree, but I would look at the specification sticker on the door jamb, and use the pressures stated there. There also should be an inflation chart in the Owner's Manual that goes into more detail about what pressures should be used at what load.
IMO, the MAXIMUM pressure stated on the tire sidewall is for the MAXIMUM rated load of the tire, ONLY. For any load lighter than that, you can have a corresponding decrease in pressure. If you run the tires at maximum rated pressure, with a light or no load, you will wear the center of the tread out. You want a tire pressure which will allow the tread to lay flat on the road surface, and wear evenly all the way across.
Just my opinion, of course, others will disagree, some quite vehemently.
FYI, I am a retired mechanic. At one time I was trained and certified (military and civilian) for demounting and mounting tires on multi-piece wheels (split-ring, snap ring, and bolted, truck, industrial equipment, and aircraft).
Sorry, but I need to clarify why I cannot do this. The original tires on the Ex were D load 65 psi tires. These were recalled by Ford and replaced with E load 80 psi tires. The owners manual and the door sticker both relate to the original D load tires and therefor cannot be used for information.
Amen to that. Our Excursion fortunately came with BG Goodrich Load Range E tires, but the (worthless) sticker had numbers based on D tires.
Of course, dealer knew no better, and had the lower pressure (as on the door sticker) in the tires. The first thing we did to the Ex, the same day we brought it home, was air up all 4 tires to around 70 psi. that improved the ride/handling SIGNIFICANTLY, was very noticeable. And, after 5+ years of use both towing and non-towing...I see no uneven wear in the tires at all. They are all wearing very evenly, and after 48,000 miles, still have a good bit of tread left on them.
Soo, anyway, you're on the right track, airing up those E load tires. The Ex in particular, seems to ride better when you put 'bout 70-75 psi in the tires.
Thanks for that. 70 psi seems to be the sweet spot for tires on the Ex. For those that do not have one, the Ex is a much heaver vehicle than any PU or SUV out there.
????????? My Ford Superduty CC SB is nearly 700 lbs. heavier @ 7880 lbs than the EX. The long beds are even heavier. I am not sure how you came up with that conclusion.
As far as air pressure its hard to understand how that light of vehicle can ride good or better as you say with 70+ psi. You are slightly heavier than the superduty in the rear and lighter in the front. IF I run 70-80 when empty I can't begin to tell you how rough it rides empty, and as far as I am concerned does the truck no good to ride that hard. I have no desire to see how tight all the bolts are in my truck. Like you said I don't have an EX, but you have with E rated tires ,I don't know your size roughly from 3200-3750 lbs rating for a total of 12800-15000 lbs total carrying capacity distributed on four tires. You are roughly using about half the tire rating.
One thing you're forgetting about: The one difference between the Ex, and the F250/F350, was that Ford gave the Ex MUCH softer leaf springs. That probably explains why airing the tires up some seems to dial the truck in well and make it handle better.
Obviously Ford thought so, too, since they switched to load range E tires on them, AND went to the expense of issuing a recall to put E tires on them.
Will
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up2nogood
Utah
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willald wrote:up2nogood wrote:rlh6805 wrote:willald wrote:rlh6805 wrote:mowermech wrote:There are a lot of people who don't agree, but I would look at the specification sticker on the door jamb, and use the pressures stated there. There also should be an inflation chart in the Owner's Manual that goes into more detail about what pressures should be used at what load.
IMO, the MAXIMUM pressure stated on the tire sidewall is for the MAXIMUM rated load of the tire, ONLY. For any load lighter than that, you can have a corresponding decrease in pressure. If you run the tires at maximum rated pressure, with a light or no load, you will wear the center of the tread out. You want a tire pressure which will allow the tread to lay flat on the road surface, and wear evenly all the way across.
Just my opinion, of course, others will disagree, some quite vehemently.
FYI, I am a retired mechanic. At one time I was trained and certified (military and civilian) for demounting and mounting tires on multi-piece wheels (split-ring, snap ring, and bolted, truck, industrial equipment, and aircraft).
Sorry, but I need to clarify why I cannot do this. The original tires on the Ex were D load 65 psi tires. These were recalled by Ford and replaced with E load 80 psi tires. The owners manual and the door sticker both relate to the original D load tires and therefor cannot be used for information.
Amen to that. Our Excursion fortunately came with BG Goodrich Load Range E tires, but the (worthless) sticker had numbers based on D tires.
Of course, dealer knew no better, and had the lower pressure (as on the door sticker) in the tires. The first thing we did to the Ex, the same day we brought it home, was air up all 4 tires to around 70 psi. that improved the ride/handling SIGNIFICANTLY, was very noticeable. And, after 5+ years of use both towing and non-towing...I see no uneven wear in the tires at all. They are all wearing very evenly, and after 48,000 miles, still have a good bit of tread left on them.
Soo, anyway, you're on the right track, airing up those E load tires. The Ex in particular, seems to ride better when you put 'bout 70-75 psi in the tires.
Thanks for that. 70 psi seems to be the sweet spot for tires on the Ex. For those that do not have one, the Ex is a much heaver vehicle than any PU or SUV out there.
????????? My Ford Superduty CC SB is nearly 700 lbs. heavier @ 7880 lbs than the EX. The long beds are even heavier. I am not sure how you came up with that conclusion.
As far as air pressure its hard to understand how that light of vehicle can ride good or better as you say with 70+ psi. You are slightly heavier than the superduty in the rear and lighter in the front. IF I run 70-80 when empty I can't begin to tell you how rough it rides empty, and as far as I am concerned does the truck no good to ride that hard. I have no desire to see how tight all the bolts are in my truck. Like you said I don't have an EX, but you have with E rated tires ,I don't know your size roughly from 3200-3750 lbs rating for a total of 12800-15000 lbs total carrying capacity distributed on four tires. You are roughly using about half the tire rating.
One thing you're forgetting about: The one difference between the Ex, and the F250/F350, was that Ford gave the Ex MUCH softer leaf springs. That probably explains why airing the tires up some seems to dial the truck in well and make it handle better.
Obviously Ford thought so, too, since they switched to load range E tires on them, AND went to the expense of issuing a recall to put E tires on them.
Will
Thanks, that explains the difference in ride
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8.1 Van
Millstone NJ
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Quote:????????? My Ford Superduty CC SB is nearly 700 lbs. heavier @ 7880 lbs than the EX. The long beds are even heavier. I am not sure how you came up with that conclusion.
The 4x4 5.4L Excursion curb weight is 7,162 lbs and the 4x4 5.4L F350 crew cab long bed is 6,402. The 4x2 5.4L Excursion is 6,680 lbs and the 4x2 5.4L F350 crew cab long bed is 5,978 lbs so it's the Excursion that is 700 lbs more than a F350 CC LB.
FKA PSDExcursion
2002 Chevy Express LS 3500 8.1 155" WB passenger van 3.73 posi (GT4/G80)
41 Ft 2003 Thor Citation 41-ZBSR TT w/ Hensley Arrow
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mowermech
Billings, MT
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fulltimin wrote:fulltimin wrote:Generally tire pressures should be matched to the weight that is being carried. There is no reason to fully inflate tires to their max pressure, if the weight being carried is nowhere near the max weight rating of the tire.
mowermech wrote:There are a lot of people who don't agree,.......snip...
IMO, the MAXIMUM pressure stated on the tire sidewall is for the MAXIMUM rated load of the tire, ONLY. For any load lighter than that, you can have a corresponding decrease in pressure. If you run the tires at maximum rated pressure, with a light or no load, you will wear the center of the tread out. You want a tire pressure which will allow the tread to lay flat on the road surface, and wear evenly all the way across.
How is this different than what I said? 
Just a guess, but I would say that we were typing at the same time, and your post ended up before mine. When I started typing, your post wasn't there. If I had been a little quicker, your post would have been AFTER mine, then what?
As for the differences in tire type requiring different pressures, sorry, I don't buy it. I replaced the D rated tires on my truck with one size larger E rated tires (the one size larger corrected a speedometer error, an unanticipated benefit!). I run the recommended pressures from the Owner's Manual. It works for me, good ride, no unusual tire wear. Same thing on the Tioga, one size larger, E rated, recommended pressures, so far, so good. The truck is a Dodge, the Tioga a Ford.
The bottom line, of course, as in all such discussions, it is YOUR vehicle, YOUR tires, do it YOUR way. It is unlikely that any harm will result from whatever you decide.
CM1, USN (RET)
'94 Dodge 3500 4X2 CTD, Std. cab, LB, 5 speed, 4.10 LS diff., Jacobs Rambrake, 273,000 Miles
'99 Monaco McKenzie 32' triple slide
'95 Tioga 29H Ford-based Class C
Daily driver: '06 Jeep Liberty CRD
Towed: '06 Jeep Rubicon Unlimited
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