LC200 Regular Drive Tire Pressure (1 Viewer)

[Eire32]

Hey Guys;
What tire pressure are you running on your non modified stock LC200’s for regular highway mall and everyday driving?

The dealer set mine to 38 and my spare at 47????? but the door sticker and manual all say 33.

Wondering why they would do that, and what you guys use

 

[bloc]

Door sticker is correct, as long as they are P285/60r18.

The P is very important. If they are LT285/60r18 they require more pressure.

As for the spare, I run mine higher than road pressure so I don’t need to worry about it having enough in the event that it bleeds down some before use. If I need to install it, I lower the pressure to whatever I run for my main set. I doubt the dealer put this much thought into it, but it isn’t unprecedented.

 

[Eire32]

Door sticker is correct, as long as they are P285/60r18.

The P is very important. If they are LT285/60r18 they require more pressure.

As for the spare, I run mine higher than road pressure so I don’t need to worry about it having enough in the event that it bleeds down some before use. If I need to install it, I lower the pressure to whatever I run for my main set. I doubt the dealer put this much thought into it, but it isn’t unprecedented.

Thanks, they are the P285/60r18

 

[Sandroad]

Here's the long thread on that if you want to see what others are using for various setups, including OEM.

Tire Pressure recommendation

I am running the Goodyear Duratrac in 285/70/17 on RW wheels. All the charts that I have found and somewhat understand look as if 49psi is the correct pressure I should run. I am stock, other than a Gobi roof rack. The specs on the Duratracs are as follows - Tire SizeLT285/70R17 Speed...

forum.ih8mud.com

BTW, dealer techs aren't at all careful and pressures are set somewhat randomly. And they almost never wait until the tire is cool, which is the only time to check pressure.

 

[gaijin]

Here's the long thread on that if you want to see what others are using for various setups, including OEM.

Tire Pressure recommendation

I am running the Goodyear Duratrac in 285/70/17 on RW wheels. All the charts that I have found and somewhat understand look as if 49psi is the correct pressure I should run. I am stock, other than a Gobi roof rack. The specs on the Duratracs are as follows - Tire SizeLT285/70R17 Speed...

forum.ih8mud.com

BTW, dealer techs aren't at all careful and pressures are set somewhat randomly. And they almost never wait until the tire is cool, which is the only time to check pressure.

Toyota has issued a TSB to deal with how to set tire pressures when the tires are not "cold," but I agree, dealer techs have probably never seen this TSB, and certainly don't follow it.

Here it is for anyone interested:

HTH

 

[AnyMal]

Toyota has issued a TSB to deal with how to set tire pressures when the tires are not "cold," but I agree, dealer techs have probably never seen this TSB, and certainly don't follow it.

Here it is for anyone interested:

View attachment 2759618

HTH

This chart doesn't even make sense. If you follow this you would be only setting placard PSI at 0F ambient and parked cold?

 

[iwashmycar]

This chart doesn't even make sense. If you follow this you would be only setting placard PSI at 0F ambient and parked cold?

Its the difference in ambient from shop temp.....but they dont say what shop temp is....but say its 70 degrees. You would set placard temp if they were cold and it was 70 degrees outside (ambient)

 

[AnyMal]

Its the difference in ambient from shop temp.....but they dont say what shop temp is....but say its 70 degrees. You would set placard temp if they were cold and it was 70 degrees outside (ambient)

Thanks, I misread that bit, but its still very dumb.
Why even have the chart show a delta range of 108 degrees if thats supposed to be the shop variability?
I don't know of any HVAC system good enough to lower the temp of any building more than 30-40 degrees from ambient at the absolute most on the cooling end unless the area is completely hermetically sealed and insulated, maybe if your shop is in Antarctica it might be relevant form a heating perspective.

Either way this is entirely unscientific and doesnt take into account how long its been in the workshop, and what temperature the air is that you will be filling the tire with and makes a lot of assumptions about the ambient "seasonable" temp range. Also doesn't account for the most likely scenario of highway driving, and sitting before being pulled into workshop, which is how it will be done 90% of the time.

A much better way to do this would be to just measure to Fing temp of the tire... which takes 1 second and is in realtime.. Then set a benchmark for "cold" at ambient which would take a couple of more seconds looking at a thermometer.
You could actually achieve some form of scientific precision that way without making a bunch of assumptions since we can calculate thermal expansion of air or nitrogen.

No wonder the dealer never gets it right, if they are even trying they are using this garbage TSB.

EDIT: BTW my BMW M4 actually gave the TPMS temp reading from inside the tire on the instrument cluster. No need for any BS.