AKA_Kal_El

I hear ya, but it comes down to cold hard math. At least you know where the numbers say they NEED to be and you can adjust in either direction. That's the beauty of mods, it's whatever works best for you!

tgoller

I always run what the sidewall says, in my pickups and in my assigned truck at work. 110 psi in steer tires and 100 psi in the 16 other tires. If I let the air out of my tires to 35 psi tire will bulge and look flat, my 3 week old tires will begin to show underinflation wear in no time. The tires on the F150 are inflated to 44 psi. BTW Ive never had a blowout in my pickup even in 105 degree summer heat. My last set of tires said "inflate to 44 psi" on the sidewalls.

Tradesman

Thanks! I recommend that as well. I don't have the same knowledge and experience as you or the others but I have always run my tires around 4-12 psi higher than the recommended, but always below the maximum.

Oh yeah brother! Gotta start dodging them tires!

BassAckwards

I'm not sure how since the charts show that the same size LT Tire @35 psi will still hold more weight than your truck is even capable of hauling. And I was discussing an empty truck for daily commuting. Please explain?

This^

That's the most common mistake people make is thinking the sidewall max inflation pressure is where you should be set for daily driving. This is only true for trailer (ST - Service Trailer) tires. They are designed to run at the Max PSI all the time

Obviously AKA_Kal_El and I could debate all day wether the LT tires should be set to match the weight holding of the P-Metric or wether 35 psi is sufficient, but if you take anything from this thread please just know that the Max PSI written on the sidewall is not where your pressure should be set for every day driving. It has nothing to do with that.

BUCKSHOT

Understood and like I mentioned previously I am not questioning or trying to argue with ya. The way I seem to have found my "sweet spot" for air on my present tires is I simply did the chalk test and it seems to be working quite nicely with my current tires and that is 35 psi. for the 35's I currently have on there now. On another note, I have lost count how many times I have taken my truck in for an oil change just to get it back with the tires jacked up to 60 psi in all 4 after having told them countless times to forget the tires and don't touch'em.....

AKA_Kal_El

LOL! I hear that far too often in my business. May I suggest either metal valve caps that have have a wrench to tighten them past finger tight, OR green valve caps (which indicate nitrogen inflation), they are not supposed to add regular air to N2 filled tires unless they are dangerously under inflated. (Either way your still relying on guys whom you've already asked not to adjust your psi so you might be screwed... lol. )

As echoed by both myself & BassAckwards, the max PSI on the tire is NOT the pressure you need to be running your tires at all the time and apparently far too few "mechanics" know this either.
(A few exceptions not withstanding)

Happy Inflating All

tgoller

Forgive me if i seem about skeptical, i just sounds silly to me to run 35 psi in a tire thats rated at 50. I understand what your saying about max pressure, but im not going to ruin a $900 set of tires because of what a $2 sticker says, especially if thats not even the tire size im currently running on the truck. It is still my firm opinion that the factory door jam sticker only applies to the tires the vehicle had on it when it rolled off the assembly line. There is no possible way for the manufacturer of the vehicle to anticipate what tire size, brand, load rating the owner will run on said vehicle years down the road.

BassAckwards

Run it at 50 if you would like, just be aware that running to much air will ruin your tires just as fast as not enough. Just might be a little less likely to have a blow out, but you will also reduce your contact patch and traction and be less stable in wet weather or snow.

No, your tires never said "inflate to 44psi" they said "Tire will hold XXX kgs (X,XXX lbs) at 44psi Cold." Big difference, also if you will look at a chart I posted earlier, a P-Metric tire does not gain any load bearing capacity beyond 35 psi. Those P-Metric tires whoms max PSI is at 44 or 51 are only those tires who have a high speed rating and these over-inflations are to allow them to travel those speeds. The only exception is P-Metrics with the "XL" designation.

tgoller

Ive never had a blowout on any of my pickup trucks, not one single time. And ive also never had any traction trouble either, other than trouble that might come from driving a light 2wd in deep snow. And as far as them not fully contacting the road, they wore evenly for the entire life of the tire.

I guess we'll just have to agree to disagree