45-50 psi on LT "E rated" tires?
#32
11-04-2011, 04:57 PM
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#33
11-04-2011, 06:55 PM
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#34
11-04-2011, 10:23 PM
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canadianelbow: I went and looked at a sticker today while at the Ford dealer for an 2011 f150 lariat 4x4, which I suspect was a "heavy duty" or whatever the package was, and it did indeed say 50 PSI on the door. My bad. If the door says it, then the TPMS wont let it get any lower than that, guess your stuck with a rough ride OP.
#35
11-05-2011, 08:24 AM
#36
11-05-2011, 11:09 AM
Senior Member
Surprised this is not a little higher. Those tires, (willing to bet they are Goodyear Wrangler AT/S), have the same weight rating as my LT275/70R17 Wrangler AT Extreme, about 2600lbs. My recommended pressure is 45. Only difference is the rim size and ration (65 vs 70).
#37
11-09-2011, 08:03 PM
I have 305/55/20 Toyo AT's and run them at 42 psi at all four points. Have 40K on them with still 10-15k left. They are wearing very even and ride very smooth city and hwy. I will do the same setup next time. I pumped them up to 45 and they beat the snot out of me....aired them back down to 42. Done.
#38
11-30-2021, 01:50 PM
Thank you
And if your vehicle came with a LR E it would state 50 psi, my LR C are 45, and the only tires with a recommended pressure of 35 are P series. And that only because you get no more load carrying ability at pressures above 35 on a p series.35 on a LR E is dangerous. Most LR E tires have a weight rating of 3200 to 3600lbs. At 35, you are well below half that rating which doubled up does not come close to the GAWR of your truck.
The minimum that should ever be in a LR E (not including those that have a weight rating of 4000+) would be 45. The 4000+ LR E could be okay for normal everyday unloaded driving at 40.
The construction of these tires require a higher pressure for support. Low pressure cause heat which will cause tire failure.
The federal mandates for the TPMS systems state that with a LR E tire, the sensor should put out a waring at 46psi.
LT tires do give a rougher ride, no doubt, but only because they require higher pressure and are built far sturdier. If you do not want the rougher ride, get a P series tire.
YellowFX4, you could drop them to 50 with no problem, but as I stated, do not go below 45 unloaded.
The minimum that should ever be in a LR E (not including those that have a weight rating of 4000+) would be 45. The 4000+ LR E could be okay for normal everyday unloaded driving at 40.
The construction of these tires require a higher pressure for support. Low pressure cause heat which will cause tire failure.
The federal mandates for the TPMS systems state that with a LR E tire, the sensor should put out a waring at 46psi.
LT tires do give a rougher ride, no doubt, but only because they require higher pressure and are built far sturdier. If you do not want the rougher ride, get a P series tire.
YellowFX4, you could drop them to 50 with no problem, but as I stated, do not go below 45 unloaded.
I have a tundra and have been searching far and wide on the internet for an answer. Went up a tire size and let me say from tundra to f150 to w.e. other forums I have stumbled on, THANK YOU for this answer and info that lead me to tpms fed numbers, pulled up doc pdf with everything you've said and heck yes.
Costco put 30f 33r in 275 70 18 on my tundra... I saw the sidewall and without question or research threw it to 40 and now heading out to do 45 plus test the ride out maybe Increase.
Anyways, made account to show massive appreciation of the information presented.
