Tire pressure: 32psi or 44psi??? HELP!!

[snowbrdr033]

This one is debatable, but I always like to go higher with my PSI. The ride may be rougher, but it helps with tire wear, but you also have to be careful that you don't over inflate, as this can cause uneven tire wear.
But it also helps in the mpg department....

 

[MikeInNH]

Someone said the 32 is because it's based on the original tire.

It has EVERYTHING to do with weight (weight of the vehicle).

The Benefits of Correct Air Pressure - Discount Tire


You can actually weigh your car by just measuring each of the tires footprints and psi. The more air you have in the a tire the less footprint. It's an interesting science experiment.

Illuminations: Weighing Your Car

 

[Ronin61945]

Resurrecting an old thread

As a very happy, brand new T4R owner (2017 LE) I am planning a 1500 mile road trip over the next few weeks. I have the original Bridgestone Dueler H/T 684-II tires. From this old thread, I see that it is OK to add a couple of psi to the recommended 32 psi but to stay significantly below the maximum. If the truck is going to be loaded with perhaps 500-750 lbs of baggage and equipment for my trip, should more air be put in the tires or should I stick to the 32-35 psi range?
Thanks

 

[riceandpho]

i say just keep the psi at 34. i had ran 40 but thats when i had 22s with a thinner tire.

 

[NinjaOne]

As a very happy, brand new T4R owner (2017 LE) I am planning a 1500 mile road trip over the next few weeks. I have the original Bridgestone Dueler H/T 684-II tires. From this old thread, I see that it is OK to add a couple of psi to the recommended 32 psi but to stay significantly below the maximum. If the truck is going to be loaded with perhaps 500-750 lbs of baggage and equipment for my trip, should more air be put in the tires or should I stick to the 32-35 psi range?
Thanks

Most accurate way is to do the chalk test with the weight in the vehicle
https://www.youtube.com/watch?v=ojGsavK0Uwc

But yes, you'll prob. end up with extra PSI. Results will vary based on how stiff your tire is and your actual cargo weight.

 

[Ronin61945]

I appreciate the information. I will use 34 psi for now and when I can find the time, I will do a chalk test.
Thanks,

 

[Atlanta_man]

My tires say LTX which has me wondering about pressures too.

 

[cwagner]

Most accurate way is to do the chalk test with the weight in the vehicle
https://www.youtube.com/watch?v=ojGsavK0Uwc

But yes, you'll prob. end up with extra PSI. Results will vary based on how stiff your tire is and your actual cargo weight.

I plan on definitely doing a chalk test soon without any cargo, just to get a baseline to work from. Thanks for the link. Had one other question though. I have a 2018 4runner TRD ORP w/KDSS and stock 265/70/17 Bridgestone Dueler H/T D684II tires. Dealer had them overinflated so I dropped them down to about 36 since I'm doing mostly paved road driving right now. I noticed that there is a somewhat noticeable sidewall bulge on all 4 tires where they contact the pavement. I assume this is normal, but just looking for confirmation I guess. I had a 96 Jeep Cherokee, second owner, took it up to 275k, but got a sportier car with low profile tires after than and before this, and the wider, low profile tired tend to "look" a bit overinflated.

 

[mannydantyla]

lol at all the folks saying they run 32psi because that's what it says on the door jam, as if that's what the supreme, all-knowing, all-power Toyota engineers had spec'd the vehicle to use. Any more pressure and the tires will be too tall which will cause the driveshaft slip joints to bottom out! Or something

I run 40 psi because it gives me better fuel economy.

 

[0verland]

So my 4runners specs says, manual and frame door specs, that I should run them at 32psi, but my tires specs, Bridgestone Dueler H/T a max of 44psi. For I run 100% road, no off road what so ever, until I get new tires and spacers lift.

What should I do? Its a V6 btw, no hauling....

V8 here, I run Michelin LTX AT2 tires and barely see anything off the pavement. Keep them inflated at 40 PSI. I don't have any extra armor or bumpers, completely stock body.

 

[Ralph Blake]

I run 35psi all year around in every auto or truck i own, if i have a heavy load i up it to the max tire pressure.

But by keeping pressure at 35 in winter when in real cold weather, you lose air pressure having a little extra air pressure in tires is good insurance.

 

[ConfuciusX8]

I would go by the tire specs, personally.

However, leaving the front just a couples pounds less than the tore specs, will give you a softer ride, and NOT rattle your front end to pieces, lol

Food for. Thought!

ConfuciusX8

 

[rdruss]

I run Michelin Defender LT 265/65R17 @ 37psi. Ride is great as is wear.

 

[Shiftless Joe]

P Series: whatever's written on your door sticker

LT: whatever's written on your door sticker plus 15psi

LT sidewall flex while driving generates too much heat at pressures lower than P+15, the higher you go beyond that you risk a rough ride and possible hydroplaning.

https://www.nittotire.com/media/q1tf1xzk/techbulletin_ntsd-12-011.pdf

 

[Flyer]

32-34 always give me an even chalk line with all the diff (P and C rated) tires I have tried, which is the most accurate way of determine proper PSI in non-towing vehicles. When towing, things are a bit diff since you have to compensate for the loaded weight, but the chalk line test still is the best way. We do this in the Jeep world since we use bigger tires. Of course, some of those nuts use E rated teeth-rattler tires so all bets are off since they chalk up at 22-24 PSI at times. That may be too low for the highway and cause overheating.