TMPS Alert on 3 wheels. What's the correct tire pressure for 19" wheels on a P100D

[DCEV]

I was driving the other day when all of a sudden as soon as I made a turn, a TMPS alert went up for 3 of my wheels at the same time. They are now all showing 40 PSI in yellow. It's odd all 3 wheels are stating the same pressure and I'm hoping this is because of the drop in temperature and not because 3 wheels have an issue!

What is the correct tire pressure or pressure range for 19" wheels on a P100D?

I looked at the door sticker and that calls for 42psi front and rear but that is for the 21" wheels that came with the car so I'm not sure if the same pressure is applicable for 19" wheels.

I appreciate any advice! I keep a portable air compressor in the car so I should be able to top off the air after the experts here chime in on the correct pressure

 

[KingBozo]

I have 18's and it calls for 42, maybe they all do.

 

[Ostrichsak]

This has been covered numerous times; set your pressure to 45psi and go on with your life.

 

[DCEV]

This has been covered numerous times; set your pressure to 45psi and go on with your life.

I did look it up and I have seen a wide range of suggestions so wanted to better understand the reasoning. You yourself just contradicted the psi rating on the door sticker of the car.

 

[croman]

45 is right. Cold.

 

[Lukez]

When the service center installed my winter tires on my 19" rims I left there with 50psi on the sensors so I don't think they care either lol

 

[DCEV]

Could someone check what the door sticker says for a 2018 or 2019 Model S with 19" wheels? Does the door sticker say 42 psi for both 21 and 19" wheels?

Seems I should set the pressure between 42-45.

 

[PWlakewood]

I noticed its 31 where you are at so your pressure will be lower when the tires are cold. Drive for a bit and see if they come back up otherwise just fill to 45 and roll on

 

[Wyomingtim]

Could someone check what the door sticker says for a 2018 or 2019 Model S with 19" wheels? Does the door sticker say 42 psi for both 21 and 19" wheels?

Seems I should set the pressure between 42-45.

I have a 2019 Model S with 19" wheels. The door sticker says 45.

 

[ucmndd]

You want 45 psi. End of discussion. @Ostrichsak is right and this is not a rocket science sort of situation.

 

[PWlakewood]

You want 45 psi. End of discussion. @Ostrichsak is right and this is not a rocket science sort of situation.

Well technically since the model S was originally designed in a space x facility.............

 

[PhilDavid]

Hyperbole? Hardly. I was being 100% serious because rather than search someone feels the need to start an entirely new thread about this very topic weekly.

I for one am grateful the OP asked this question as our temps are dropping as well and it made me check my tire pressure. Sure enough on two wheels I was within 1 PSI of the TPMS warning triggering. I'm glad I checked the tire pressure on all 4 wheels to avoid seeing a TPMS warning when I'm on my way somewhere or confusing my wife if she was driving somewhere.

With the temps falling, I suggest everyone check their tire pressure as well and I recommend that you keep a small portable air compressor in the car. It might even save you one day if you have a "slow puncture/leak."

To the OP: This is probably your first winter with the car and the fact that you are getting the warning on all 3 wheels suggests this is due to the dropping temps, as you are seeing a consistent drop on 3 wheels. Just add some air and you should be fine.

There has been varying PSI numbers suggested over the last several years so I don't mind this topic being brought up. The consensus for now seems to be 45 psi and possibly reduce that by 2-3 psi for comfort if you decide you prefer that. Ambient temperatures does affect the tire pressure so in my case, I set all four tires to 44 psi.

As always, keep an eye on tire pressure and tire wear about once a month.

 

[UkrHog]

Lol
45 Cold, I was in the same situation went with my P from 21s to 19s. Love the softer ride and better range

 

[DCEV]

Thanks again for everyone who was nice enough to help, despite one person who seems quite upset!

I decided to fill with 78% nitrogen and the alerts went away. I went with 45 psi but the car seems to be noticeably "bouncier" than before. Wonder if I should reduce by a few PSI...

Has anyone seen any information on how tire psi +/- 10% affects launch performance?

 

[Ostrichsak]

Thanks again for everyone who was nice enough to help, despite one person who seems quite upset!

I decided to fill with 78% nitrogen and the alerts went away. I went with 45 psi but the car seems to be noticeably "bouncier" than before. Wonder if I should reduce by a few PSI...

Has anyone seen any information on how tire psi +/- 10% affects launch performance?

Okay, I'll bite... what exactly about my post makes me "seem quite upset" as you put it? Also, try to remember that I was the first correct response to your question.

 

[ucmndd]

Okay, I'll bite... what exactly about my post makes me "seem quite upset" as you put it? Also, try to remember that I was the first correct response to your question.

The right answer isn’t enough for a pedant. They need the complete narrative and detailed educational discovery to satisfy the neurosis.

 

[pdxrajiv]

I noticed that the door stickers the OP posted are for 21" wheels. (Note the 245/35R21 Front and 265/35R21 Rear notation)
He says he now has 19" tires.

That explains the discrepancy between 42 vs 45 psi numbers.

Maybe the car originally had 21" tires and that is what the door sticker refers to.

For Model S 19" wheels, I have consistently seen the 45 psi setting.

 

[boonedocks]

45psi is 100% correct

 

[DCEV]

I noticed that the door stickers the OP posted are for 21" wheels. (Note the 245/35R21 Front and 265/35R21 Rear notation)
He says he now has 19" tires.

That explains the discrepancy between 42 vs 45 psi numbers.

Maybe the car originally had 21" tires and that is what the door sticker refers to.

For Model S 19" wheels, I have consistently seen the 45 psi setting.

Thanks! Yes, that's exactly what happened.

And I wanted to see what a current door sticker stated for 19" wheels and someone helpfully confirm it is 45 psi.

The car does seem bouncier than it used to be at 45 psi though.

 

[pdxrajiv]

I did look at my door sticker and verified that it says 45 psi. I will post an image when/if I get to it.
Edit: And I stopped being lazy.