Tire pressure

The factory tire pressures call for 30psi front and 33psi rear. My TRD pro was set at 40 psi all around by dealer. I thought that was kinda high so I reduced it to 32psi and 35psi respectively.
I went back to the dealer for a service ( tire rotation included) and they inflated the fronts 39 psi and rears 38psi.
I had a talk with service advisor about this on initial check in and he said factory settings are too low.
What are your thoughts? What do you have your tires set at?

 

Stock Michelin LTX AT-2’s?? You’ll wear the center of the tread out and suffer from a harsh ride and poor traction at those high pressures.

 

Your TPMS will go off in cooler temperatures if you have it at factory settings, so they usually bump it up a little bit to avoid that; I may be crazy, but I always have mine set to ~50 and feel like I get a better ride, and slightly better gas mileage.

 

@The Californian so when yours warm up they're at about 54 ~ 55? Knocking on the max. I think that's too high, safety and tire wear definitely become a factor. The 50's are low profile tire pressures...lol.
As far as cooler temperatures the advisor also mentioned the same thing. But I adjust the pressures accordingly in the fall....when it cools down.

 

You can change what the TPMS temp is set for to prevent this.

 

50 psi is crazy high. You're definitely hurting your ride quality, but beyond that I'd consider it a bit dangerous.

 

OP, the dealer put the pressure up on my '21 at around 36-37. In hot weather they're at 38-39. I've been meaning to air them down as well like you did.

And yeah, airing up your tires high so the TPMS indicator doesn't goes off in cold weather isn't the way to go about it. Inflate your tires for the season. When it gets cold, add air. When it heats back up, air them down a bit.

 

35 cold. 38/39 hot.
I used to run 40 cold but it was a bit harsh.

 

I actually set mine to around 47psi so they warm up to 50.

 

Don't forget it depends on the time of year. My stock 20's says 30 Front, and 32 Rear. I run 32 Front, and 35 rear to keep the TPMS happy with no lights. Lots of different configurations on the tire sizes we run, and how you run them. Find what works best for you, then adjust them according to the temp. Yes its a PITA, but what isn't when you own a truck?

 

How is it dangerous?? The tires I have on my truck have a max cold psi of 80. OEM tires are rated for 50psi cold. Other than a bumpy/harsh ride, what is the danger about running higher pressure than Toyota suggests?

The weight rating listed on the tire is only good at max psi - the lower your pressure the lower the carrying capacity of the tire.

If you’re running 30 psi on P rated tires fully loaded the shoulder of your tires will be hotter than you’d like and your begging for a failure.

 

If your tires are still running even then fine. But that's substantially higher than recommended. If they're ballooning in the center, things can get squirrely.

 

The max cold psi stock tires on my Platinum is 44psi. I run 35psi all around, with higher psi you achieve better tire wear and mpg while sacrificing stopping distance and ride quality. I also have on board air so I can easily decrease psi to 15psi when on sand which is night and day to 35psi on sand. You can safely cold fill your tires to what ever your tires max psi is on the tires sidewall but just know you are going to have a harder ride and longer stopping distance. I settle at 35 as it gives a decent compromise of ride quality/mpg/stopping distance and tire wear. I definitely agree the door stickers are pretty low for tire pressure but thats because they provide the safest and smoothest ride. Always adjust your psi between summer/winter and road conditions, if you set you psi to 35 in the winter it can end up being 40+ in the summer so just be careful and check regularly.

 

Chalk test your tires, only real way to know what's going on with pressures.

 

Take this for what it is worth. Here is a breakdown for e-rated falkens vs factory 20" bridgestones, direct from Falken. Makes sense, but chalk test and get the best contact patch you can - tread wear and tire life will thank you. That said, I've never heard about FoS before but it makes sense

Rear axle 1 was was unloaded and rear axle 2 was with raw tongue weight of a trailer.

 

I tell the service people and the techs not to adjust air pressure; usually when getting them rotated at Discount Tire. I went OCD on pressure settings and have them at 32/30 for Mickey Thompson ATZ 295/70/17s. The techs always tell me I should increase pressure and I tell them nope. In my experience 2 psi can make a big difference in ride. I do bump it up to 35psi all around for road trips. I forget shit all the time so I have a little green book that I log everything in; torque specs, PSI.... Thats another thing they jack up- I tell them 95 ft-lbs on the Methods and they always go 100 ft lbs - I watch them and then ask the dude... "Did you torque them to 100?" "I said 95". They get aggravated.