Tire Pressure on e rated tires?

1Texan · 03-25-2014, 02:44 PM

I just replaced my OEM P rated tires with new Michelin LTX M/S E rated tires. The tech at Discount Tire asked me if I wanted normal tire pressure or Wanted to pump them up more. Am I correct to assume I can run the normal 38 psi on the empty truck and when I want to hook up the 5th wheel I should then air up to 75 psi? The ride will certainly be smoother at the lower psi, but will it cause wear problems? Opinions?

What do others run their E rated tires at during normal and loaded/towing?

Thanks

Cajun Po-Boy · 03-25-2014, 02:50 PM

I've always ran my in the 60's when not towing...IMO anything lower could cause abnormal wear

Ford Idaho · 03-25-2014, 02:52 PM

What is the PSI on the sidewall?

Texbahrs · 03-25-2014, 02:54 PM

Quote:

Originally Posted by 1Texan

I just replaced my OEM P rated tires with new Michelin LTX M/S E rated tires. The tech at Discount Tire asked me if I wanted normal tire pressure or Wanted to pump them up more. Am I correct to assume I can run the normal 38 psi on the empty truck and when I want to hook up the 5th wheel I should then air up to 75 psi? The ride will certainly be smoother at the lower psi, but will it cause wear problems? Opinions?

What do others run their E rated tires at during normal and loaded/towing?

Thanks

I just had Goodyear LT 265/60/20 e rated tires installed onto my 2011 Suburban. The tire dealer suggested I keep them at 40 psi during normal driving and pump them up to 65 psi when towing my 30 ft, 7000 lb TT. I haven't gone out with my trailer since getting the new tires. I am interested in seeing what other responses you get.

JoeMazz · 03-25-2014, 02:54 PM

Quote:

Originally Posted by 1Texan

I just replaced my OEM P rated tires with new Michelin LTX M/S E rated tires. The tech at Discount Tire asked me if I wanted normal tire pressure or Wanted to pump them up more. Am I correct to assume I can run the normal 38 psi on the empty truck and when I want to hook up the 5th wheel I should then air up to 75 psi? The ride will certainly be smoother at the lower psi, but will it cause wear problems? Opinions?

What do others run their E rated tires at during normal and loaded/towing?

Thanks

I just did the same thing, and they told me to run 45lbs unloaded and 80 loaded. Didn't sound right to me. I run them at 65-70 loaded and unloaded, and when the ride seems rough, I just remind myself that I'm driving a truck.

crunchman12001 · 03-25-2014, 03:17 PM

I run mine @ 80 rear and 65 front all the time. Less air in the front seems to soften the ride a bit.
crunchman

campingwilliamsons · 03-25-2014, 04:41 PM

I don't Michelins, but my truck came stock with E-Rated BF Goodrich. The factory set them at 45/50 (front/rear). They seemed to be wearing a bit odd on the edges, so I aired them to 60/65 and they ride and wear correct. The ride did not seem to change much, but the handling is better when aired up, at least on my truck. I do not air them up any more when I tow.

acadianbob · 03-25-2014, 04:59 PM

I've got 40K on my LT tires; 75% of the mileage @ 40 PSI (empty) and 25% at 50 psi (towing). Tires are wearing perfectly. There is no sense in beating yourself up with high pressures when you are unloaded. No I know that you have E rated tires (mine are C) but you might want to make sure your OEM rims are good for E rated tires pressures.

youroo · 03-25-2014, 05:02 PM

OnStar tells me my tire pressure it is the Same as on the Sidewall. The Tires are the OP.Michelin for the HD 2500.

Youroo!!

OldCoot · 03-25-2014, 05:09 PM

GY Wrangler LR E, 40# front, 35#rear unloaded, 55# front, 65# rear towing. Wear is even across tread.

lbrjet · 03-25-2014, 07:17 PM

Coot, why increase the front tire pressure towing when no additional weight is added to the front? Am I missing something?

OldCoot · 03-25-2014, 07:34 PM

Quote:

Originally Posted by lbrjet

Coot, why increase the front tire pressure towing when no additional weight is added to the front? Am I missing something?

The 5er does put wt on the front also and I don't like any 'squirm' coming from the front in case I have to swerve to avoid something.

DutchF · 03-25-2014, 08:55 PM

Being the rebel that I am, I run my Michelin LTX AT/2's at 70# in front and 65# in rear, just like it says on the sticker.

jadatis · 03-26-2014, 05:16 AM

Your original tires for the car where probably even P-tires or XL/reinforced/Extraload with a pressure needed for the maximum load of 35 or 41 psi for speeds below 99m/h.

E-load/10PR tires you have now need 80 psi for the maximum load.
But the actual loads on your tires have not chanched with the other tires.
Now stiffer tires ( E-load stiffer then P-tire) need a bit more pressure for the same load, because they have lesser surface on the ground at the same deflection.
But because the maximum load of the tires is now much higher , you still wont need the 80 psi.

If you give the maximum load and speed of tire, and from car the GAWR's and GVWR ( Gross Axle/Vehicle Weight Ratings) I can calculate an advice pressure for that. The original advice on the plancard somewhere , where also the oem pressure advices, are also calculated for the GAWR's in America.

**dcheatwood** · 03-26-2014, 05:27 AM

Quote:

Originally Posted by DutchF

Being the rebel that I am, I run my Michelin LTX AT/2's at 70# in front and 65# in rear, just like it says on the sticker.

Dutch. What sticker? Door panel?

Sent from David's RAZR M.

TURBS · 03-26-2014, 07:33 AM

All this is fine and dandy as long as the vehicle in question doesnt have tpms.

I see its a 2011 which means any pressure 10lbs one way or the other then advertised will turn tpms light on.

TURBS
Sabre owners united!

jadatis · 03-26-2014, 08:54 AM

But mostly TMPS can be reset if you know how its done.
Read once of that they could even adyust the percentage higher and lower at wich alarm was set, and ofcource the higher pressure .

TURBS · 03-26-2014, 09:57 AM

Quote:

Originally Posted by jadatis

But mostly TMPS can be reset if you know how its done.
Read once of that they could even adyust the percentage higher and lower at wich alarm was set, and ofcource the higher pressure .

Pressure values can only be done via a tuner or the dealer.
For a fee of course.

We JUST had our 2007 1500 gmc done at the dealer when we went from p rated tire to a LT.

TURBS
Sabre owners united!

KQ2N · 03-26-2014, 10:16 AM

1Texan, Are the Michelins you bought the LTX M/S2 75R/16? If so, I'm surprised you were able to get them as they are replacements for the M/S that are back ordered across the nation. 1.2 million M/S 75R16 types were recalled recently creating the shortage.

ironj · 03-26-2014, 10:53 AM

Quote:

Originally Posted by f1100turbo

All this is fine and dandy as long as the vehicle in question doesnt have tpms.

I see its a 2011 which means any pressure 10lbs one way or the other then advertised will turn tpms light on.

TURBS
Sabre owners united!

this x2.....my tpms came on under 60psi...when i switched to the new bmf rims and nittos (which are lt's as well, but only rated to 65psi max) i had to use my tuner to reset my tpms to 50.....the dealer was charging 75$ to do this....

also gotta remember that on a truck like my f250 with a dry weight near 8k lbs its prob not good to ever run under 50psi. Michellin has charts that give you minimum pressures based on individual axle weights...actually you can call them with your vehicle specs and they will tell you what the recommended pressure is....i run 65 in my nittos at all times, 65 in my michellins when not towing , and 80rear, 70 front when towing....

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