Tire Pressure for Heavier Load Range Tires

[WiseGuy2025]

Is there an ideal tire pressure for the 2019 ranger? I just had a set of tires installed:

COOPER​

DISCOVERER ROAD + TRAIL AT​

265 /60 R18 114H XL BSW​

My original tires were load range SL, but these are XL.

When I picked up the truck, I asked the guy at the counter if I should run higher pressure in these tires because of the heavier load range. He said there was no standard and it was just up to me. Then on my way home I checked the TPMS and saw that the technician put over 40 lb of air in the tires, rather than the 30 PSI called for on the door sticker.

Does anyone know if there is a recommendation to run higher pressure due to the load range, or should I just stick with Ford's recommendation for the truck and Tire size?

Thanks.

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[Fawnbuster]

285 70 17 on mine, wildpeaks, when i ran 40 cold psi my ride was a little more rough than I like so I backed it down to 35 cold psi and it rides nicer. I used to run 40psi in my Durango & or Charger at the S.O. if i ran 35psi cold with all of my notmal gear plus allergy of my scuba gear the handling was very mushy and the front end swayed. When I bumped it up to 40psi in either vehicle the ride and handling got significantly better.

I got tired of fighting with my analog gauge on my inflator so I bought a good digital one that is spot on, no more guess work.

 

[Ranger_Rocks]

Guidelines for the Application of Load and Inflation Tables

 

[acsnowrider]

Installed these KO2's back in 2019, 300 miles on truck--set pressures at 40 lbs , rotated tires every 3000 miles, using pattern recommended in owners manual. Current mileage is over 41K. Tires started at 15/32. Current measurements at 11/32. Wear pattern consistent across face of tires, no sipe/waving on edges, and and ply rating "E" (10 ply) Pretty happy, just waiting till I can install a new, bigger set. Current tire size is Original/factory -255/65R17 Would really like it install a set of 265/70's!!

 

[TJMarchand]

I have those same exact tires, same size. I still run 30psi.

 

[Frenchy]

If you're on the same tire size, run the correct pressure that the door placard states.

 

[dozxab]

https://tiresize.com/pressure-calculator/

 

[seanellaz]

Is there an ideal tire pressure for the 2019 ranger? I just had a set of tires installed:

COOPER​

DISCOVERER ROAD + TRAIL AT​

265 /60 R18 114H XL BSW​

My original tires were load range SL, but these are XL.

When I picked up the truck, I asked the guy at the counter if I should run higher pressure in these tires because of the heavier load range. He said there was no standard and it was just up to me. Then on my way home I checked the TPMS and saw that the technician put over 40 lb of air in the tires, rather than the 30 PSI called for on the door sticker.

Does anyone know if there is a recommendation to run higher pressure due to the load range, or should I just stick with Ford's recommendation for the truck and Tire size?

Thanks.

Unloaded, I run my ATTUROTRAIL BLADE X/T 35 X12.50R17 Load range E tires @ 25 PSI. They are very stiff and do not get hot in 115+degree Tucson AZ temps. Comfy. Loaded and pulling trailer I increase pressure to 38 PSI, still little to no bulge and run plenty cool. On super slow bumpy offroading / trails I decrease pressure to 18PSI. Zero problems and never have popped off the rims.

 

[WiseGuy2025]

Thanks for all the advice related to different size tires and different driving conditions. Due to the lack of response about the load range part of my question, I am going to assume that for routine highway and city travel, since I am still running the same size of tire as listed on the door sticker, I should follow that psi recommendation (30 psi, in my case). It doesn't appear load range is a reason to adjust pressure for normal driving.

Thanks!

 

[Burnt Money]

Is there an ideal tire pressure for the 2019 ranger? I just had a set of tires installed:

COOPER​

DISCOVERER ROAD + TRAIL AT​

265 /60 R18 114H XL BSW​

My original tires were load range SL, but these are XL.

When I picked up the truck, I asked the guy at the counter if I should run higher pressure in these tires because of the heavier load range. He said there was no standard and it was just up to me. Then on my way home I checked the TPMS and saw that the technician put over 40 lb of air in the tires, rather than the 30 PSI called for on the door sticker.

Does anyone know if there is a recommendation to run higher pressure due to the load range, or should I just stick with Ford's recommendation for the truck and Tire size?

Thanks.

Email Cooper. That’s what I did. Include the truck, model, 2 or 4wd and they will reply pretty quickly. I have the Cooper Rugged Treks in load range E. I think they recommend 44psi based on the rangers weight. I posted it somewhere on the forum a couple years ago. I also chalked them. What they suggested seemed about spot on after doing the chalk test. The door says 37psi I believe for the stock Dynapros I had before.

 

[dozxab]

Email Cooper. That’s what I did. Include the truck, model, 2 or 4wd and they will reply pretty quickly. I have the Cooper Rugged Treks in load range E. I think they recommend 44psi based on the rangers weight. I posted it somewhere on the forum a couple years ago. I also chalked them. What they suggested seemed about spot on after doing the chalk test. The door says 37psi I believe for the stock Dynapros I had before.

Did you try the calculator I posted? Very accurate. https://tiresize.com/pressure-calculator/

 

[WiseGuy2025]

Did you try the calculator I posted? Very accurate. https://tiresize.com/pressure-calculator/

Yes. Great resource! As I had concluded, the load range by itself doesn't effect the pressure much if the tire size isn't changing. In this case, the calculator calls for adding only one extra psi. (I might get crazy and add two!) But certainly not an extra 10 like the tire shop sent me down the road with!

Anyway. It's a solid answer, and the article accompanying the calculator is very informative.

Many thanks!!

 

[dozxab]

Yes. Great resource! As I had concluded, the load range by itself doesn't effect the pressure much if the tire size isn't changing. In this case, the calculator calls for adding only one extra psi. (I might get crazy and add two!) But certainly not an extra 10 like the tire shop sent me down the road with!

Anyway. It's a solid answer, and the article accompanying the calculator is very informative.

Many thanks!!

Glad it helped. My shop goes over by 15 sometimes. 35's on my Jeep for example. I never trust them. I go straight home and check them after new tires are put on.

 

[Burnt Money]

Did you try the calculator I posted? Very accurate. https://tiresize.com/pressure-calculator/

I put in the tire sizes. It says I should have went from the stock 37psi down to 35psi. Here is the email from Cooper.

Thanks for your email. Because you went from a standard load, 4-ply rated tire to a load range E, 10-ply rated tire, you can bump the air pressure up a little bit. We would recommend between 42 to 45 psi.



Have a Great Day!!!



Eric

Consumer Relations Specialist

Cooper Tire and Rubber Company

1-800-854-6288

Monday-Friday 8:00am-5:00pm EST

 

[dozxab]

I put in the tire sizes. It says I should have went from the stock 37psi down to 35psi. Here is the email from Cooper.

Thanks for your email. Because you went from a standard load, 4-ply rated tire to a load range E, 10-ply rated tire, you can bump the air pressure up a little bit. We would recommend between 42 to 45 psi.



Have a Great Day!!!



Eric

Consumer Relations Specialist

Cooper Tire and Rubber Company

1-800-854-6288

Monday-Friday 8:00am-5:00pm EST

This uses actual load and tire data like the car makers use for their door stickers. Basic math simplified. Not sure why Cooper would say that unless they have a minimum air pressure for that tire as a lot of Load E tires have a max 80 PSI.

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