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Old 07-23-2010, 08:23 AM   #15
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Mike
My payload is less than yours @ 1611 #. I do have 4X4, 3.73 gears. I will drop to 45-50 psi for non-tow use. IMO, I don't think 80 psi for OEM wheels would be a problem, although the tire store did say the wheel sensors may indicate a problem w/ higher psi. It didn't happen. The Michelin LT M/S have 3415 # @ 80psi load cap. FYI, w/full fuel tank, ARE f/g cap, 2 Swingcase toolboxes w/ 25# tools each, and me (220#) truck weighed 6,840 # at the CO-OP. I love this truck !! (I'll check the manual for wheel capacities)
Dan
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Old 07-23-2010, 09:22 AM   #16
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I just got a msg from service rep @ Woodhouse Ford, Blair, NE. He said 80psi on my factory rims would not be problem. He recommends dropping to 65psi for non-tow ride improvement for the load range E tires. Hope this helps someone.
Dan
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Old 07-23-2010, 10:11 AM   #17
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Quote:
Originally Posted by Farmer Dan View Post
I just got a msg from service rep @ Woodhouse Ford, Blair, NE. He said 80psi on my factory rims would not be problem. He recommends dropping to 65psi for non-tow ride improvement for the load range E tires. Hope this helps someone.
Dan
Perfect! Thanks, Dan. That will save me some money.
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Old 07-23-2010, 11:49 AM   #18
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After researching this topic, I think I'm going to go with the Michelin 265/70R17 LTX M/S 2 (Load Range E) tires. At 80PSI these give you 3195 lbs of payload, more than enough for an F150. I don't think I'll ever run them at 80PSI for towing, more like 50-60PSI.
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Old 07-23-2010, 12:13 PM   #19
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f-150 UPgradeRs READ THIS...

Quote:
Originally Posted by Aviator View Post
...the factory tires with a max load of 2040# each at 44psi...
I have factory aluminium rims, and like Mellow Mike am not sure where to find the pressure capacity for the rim...
hi craig

while pressure capacity is important and i suspect it's ~80-100 psi...

((don't forget NEW HIgh pressure valve stems))

the LOAD capacity is key.

and the details can be had...

with your VIN number this data is available online,

or a competent dealer can look it up on the password protected fleet.ford website.

open this image in a 2nd window, zoom it or copy/save and print....

Click image for larger version

Name:	wheel_specs2010_f150.jpg
Views:	268
Size:	379.9 KB
ID:	107291

this data is for 2010 trucks, but VERIFY as needed.

not surprisingly the 7 bolt STEEL wheels have the greatest capacity,

followed by the raptor rims.

all of the rest are rated to 2025 lbs each.

so IF u are 3800-4000 lbs PER axle, that's right at the limit.

tires with FIRMER side walls might be useful and tires with DEEPER tread might wear longer...

but full on Es may not provide much benefit over a 44-50 psi tire...

ESPECIALLY if the Ez r run at LOWER inflations where HEAT and FLEX are negatives.

cheers
2air'
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Old 07-23-2010, 12:24 PM   #20
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It looks like truck manufacturers have been providing P tires for a while to save money. Our '07 Tundra also came with P tires—Goodrichs. They wore fairly fast and I replaced them after about a year with Michelin LTX A/S2 Load Range E. The OEM tires were Load Range C. Most pickups are a style choice and hardly ever are used as trucks, so selling them with P tires makes sense for a lot of people, but not me. The Michelins ride much better than the Goodrichs.

Just because an E tire can be inflated to 80 psi cold pressure doesn't mean that's the right pressure for the task. I tow with 45 front and 48 rear and when not towing reduce it by 3 lbs each. Finding the right match for truck and tire can be difficult. Calling Michelin helped, but some people who answer the phone know more than others. If you go with an E tire on a half ton truck, there are no tables for that and educated guessing comes in. But there are tables showing how much inflation is necessary to carry a certain number of pounds—Tire Rack's website has a lot of information on it about tire pressure and weight carrying capacity as well as customer reviews of tires.

When I had the C range P tires, I towed with 45 rear, 42 front. One way to check if your pressure is correct is to use a tire tread depth gauge regularly to see if the tires are wearing evenly—more wear in center, too much air, more wear at sides, too little.

Same about tire pressure is true if you upgrade the trailer tires to a higher load range and/or size. I changed from 15" to 16" wheels and tires and went from LR D to LR E. I tow with 68 psi in the trailer tires and they are wearing perfectly evenly. If you get them changed at Airstream, they'll put 80 psi in them because that's what's on the tire. The same holds true with the D range tires that usually come on the trailers—it says 65, so they put 65 in them. 65 psi for a D tire is probably right, but 80 seems too much for our trailer with an E tire.

All this tire stuff requires a lot of reading and eventually knowing more than you want to. I learned there were load ratings for horizontal and for vertical weight. Did I want to know that? No. But horizontal forces are important for a trailer tire, so I tried to understand it. Since then, I have forgotten what I learned.

Mike, since the original question concerned Michelin P tires, I think because they are Michelins, you will get better wear and performance than I did with the cheaper Michelin brand, Goodrich. I used the Goodrichs for 18,000 miles without a problem. I think they would have gone about 25,000, but I didn't want to go on a 5,000 mile trip with cheap tires that would be pretty worn by the time I was coming home. I think you'll be ok with the P tires and better when the P tires get worn and you can then replace them with LT tires.

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Old 07-23-2010, 12:54 PM   #21
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Thanks, 2Air, for posting that table. I'd never go with 80PSI on LR-E tires anyway but it does make you wonder what PSI would max out the 2025 max rating. Perhaps 44PSI?

Gene,
I hear 'ya on the OEMs but my whimpy P-metric tires only hold a max of 35PSI. I feel the big rigs passing me and I rarely felt them when I had LR-E tires on my old Excursion.

Maybe I should just stick with my original plan and go with a P-metric 44PSI Michelin?
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Old 07-23-2010, 01:47 PM   #22
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I have the Michelin LT's. I run mine at 60 PSI. I was more concerned about the distance travelled and tire durability with the truck bed loaded up....
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Old 07-23-2010, 02:43 PM   #23
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[QUOTE=mello mike;874926
I hear 'ya on the OEMs but my whimpy P-metric tires only hold a max of 35PSI. [/QUOTE]

35 psi!?! C tires max at 45 I believe. D at 65. E at 80. Are these B? On a 1/2 ton truck?

I can see why you want to change. Why not LT's rather than P though? I went with E because I know I'll put a lot of miles on them in relatively few years and I start out with a lot more tread (17/32 I think). Plus, in my experience, you are less likely to pick up nails, screws, etc., with new, deep tread than worn tires. This theory may have been disproven on our last trip, but I'm not letting go of it.

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Old 07-23-2010, 02:52 PM   #24
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Yeah, I am. I'm going with LT's, LT265/70R17 Load Range E. I'll probably keep them around 50-60PSI.

Yeah, these tires are the smallest they put on their F150s. I didn't look at the tires when I bought the truck. That's my fault and will be the last time I make that mistake.
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Old 07-23-2010, 04:14 PM   #25
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mike is reading from the RECOMMENDED inflation pressure sticker...

on the trucks B pillar.

mich' makes at least 2 tires used for light duty trucks in that size...

1 comes with a max COLD inflation of 35psi and the other is 44 psi...

GO READ THE TIRE SIDEWALL for max inflation mike...

it' may not the same as the "recommended" inflation u posted in this thread...

http://www.airforums.com/forums/f463/new-tv-66578.html

btw there are some REALLY good forums out there...

JUST on the 150, 4 150 owners and enthusiasts...
_______

running many E rated tires at anything LESS than 50 psi is foolish.

if the LOAD REQUIREMENTS less than 2200 lbs or so,

just get APPROPRIATELY rated tires.


the axles, springs, rims, hubs AND tires on this 150

are all rated around the same values (rear axle/springs a tad higher)

the WEIGHT of an E rated tire is a negative IF not needed.

and running them SOFT results in heat, squirm, instability and poor handling...

and MIGHT promote failure.

http://www.nittotire.com/assets/safe...t%20Trucks.pdf

the B pillar info is important. that IS the recommended cold inflation pressure for a given load.

IF towing it's important to WEIGH THE RIG and set tire inflation accordingly.

have u weighed EITHER trailer/truck combo yet?

Quote:
Originally Posted by mello mike View Post
Yeah, I am. I'm going with LT's, LT265/70R17 Load Range E. I'll probably keep them around 50-60PSI.
to further beat this horse since we covered it in the other thread....

265/70 is >5% larger than the oem.

so the speed'o will be off 3-4 mph at 60, torque and hp will be LOWER at the rear and stopping distance will go UP.

the LARGER contact patch (with no increase in load) is more likely to hydroplane and will have LESS grip when it counts.



cheers
2air'
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Old 07-23-2010, 04:51 PM   #26
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Quote:
Originally Posted by 2airishuman View Post

GO READ THE TIRE SIDEWALL for max inflation mike...

it' may not the same as the "recommended" inflation u posted in this thread...
_______

running many E rated tires at anything LESS than 50 psi is foolish.

if the LOAD REQUIREMENTS less than 2200 lbs or so,

just get APPROPRIATELY rated tires.

the axles, springs, rims, hubs AND tires on this 150

are all rated around the same values (rear axle/springs a tad higher)

the WEIGHT of an E rated tire is a negative IF not needed.

and running them SOFT results in heat, squirm, instability and poor handling...

and MIGHT promote failure.

http://www.nittotire.com/assets/safe...t%20Trucks.pdf

the B pillar info is important. that IS the recommended cold inflation pressure for a given load.

IF towing it's important to WEIGH THE RIG and set tire inflation accordingly.

have u weighed EITHER trailer/truck combo yet?

to further beat this horse since we covered it in the other thread....

265/70 is >5% larger than the oem.

so the speed'o will be off 3-4 mph at 60, torque and hp will be LOWER at the rear and stopping distance will go UP.

the LARGER contact patch (with no increase in load) is more likely to hydroplane and will have LESS grip when it counts.

cheers
2air'
2Air,
Appreciate the detailed response. According to the sidewall, the max inflation for my present tires is 35 PSI. No difference between the sidewall and sticker. If I read the payload rating for my tires, the max payload is 1680lbs. I exceed that now. Unfortunately, the selection of tires in the 255/65R17 size is poor. There are no Load Range E tires in that size. There is a Michelin 255 tire which provides a stiffer sidewall at 44PSI but doesn't provide any more loading. Still haven't weighed the truck and trailer.
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Old 07-23-2010, 05:04 PM   #27
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Quote:
Originally Posted by mello mike View Post
...According to the sidewall, the max inflation for my present tires is 35 PSI. No difference between the sidewall and sticker...
good info

u've not listed the actual model tire...which one is it??

mich makes the LTX a/s in 2 versions that are sized exactly, both with MORE capacity.

the 44 psi version could be used at 35 psi when NOT towing and inflated more when towing.

Michelin LTX A/S

it wouldn't be logical for the vehicle maker to put tires on that are rated way LESS than the axles or springs...

and they also wouldn't use tires much OVER those ratings...

it appears the axle rating OF THIS MODEL 150 is only 3450/3850 for this truck...

so tires with 2000-2200 lbs capacity are PLENTY.

but obviously there are a lotta choices and options.

cheers
2air'
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Old 07-23-2010, 05:23 PM   #28
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Quote:
Originally Posted by 2airishuman View Post
good info

u've not listed the actual model tire...which one is it??

mich makes the LTX a/s in 2 versions that are sized exactly, both with MORE capacity.

the 44 psi version could be used at 35 psi when NOT towing and inflated more when towing.

Michelin LTX A/S

it wouldn't be logical for the vehicle maker to put tires on that are rated way LESS than the axles or springs...

and they also wouldn't use tires much OVER those ratings...

it appears the axle rating OF THIS MODEL 150 is only 3450/3850 for this truck...

so tires with 2000-2200 lbs capacity are PLENTY.

but obviously there are a lotta choices and options.

cheers
2air'
My tires are the Michelin 255/65R17 LTX A/S (35PSI) tires, the sucky ones.

I'm looking for a stiffer sidewall because I can feel it when the 18 wheelers pass me. Never felt that with the Load Range E tires. When you say more capacity, are you referring to the 44 PSI rating?
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