Will 50 psi tire cause any problems with my car?

Were the tires HOT or cold when you measured 50 ?

As you indicated, that is 6 PSI too high......if cold. If HOT it might be OK.

But there is no good reason to run even 44 cold.

Very likely no harm done. Your gauge might be off a bit too.
You did the right thing. Now don't worry.

 

Just make sure you have a good dentist, for when your teeth start rattling.

Yesterday it was 113 degrees here. I immediately noticed how "hard" my tires felt after driving for about 30 minutes. Cold PSI is set at 42/41. I wonder how much more they expanded from the heat??? I didn't check. Too darn hot to get out of the car!

 

I think this is the reason. I've been told that the cars have the tires pumped up extra hard for shipping and part of the couple hundred dollars (or whatever it is) you pay for "dealer prep" is for letting some of that air out. I wonder what else on the dealer prep list got skipped.

 

Its fine. The pressure at which tires burst is much higher. We usually run higher tire pressures for better fuel economy. After a bit more testing at 44/42 psi, I'm gonna bump mine to 46/44.

If you go too high and hit a pothole, you run the risk of blowing a tire though. So don't go too high.

 

I always adjust mine to 38/36 when I check, and last weekend when I rotated them, I had to let out a good 10 psi to get them back down there.

Either I have gremlins adding air to my tires, or Boyle's law is really a thing and it matters that last weekend was 40 or 50 Fahrenheit degrees hotter than the last time I set the pressure.

Then two days later the temps abruptly dropped to low 70s and the tpms light came on and I added some air.

-Chap

 

It all comes down to a person's comfort level. And what kind of tires they have. Some guys go up to 50 or 60 psi, and they are fine with the bone-jarring ride. But my Michelin tires feel like they get really hard, and ride rough at any level over 42. And the gas mileage never did improve at higher pressures.

But when I started hearing the suspension make unusual noises, and the hatchback started squeaking and groaning when I hit even a small hole or bump... I knew it was time to back off those PSI. I'm good with just getting 57 mpg. The heck with all those high-pressure experiments.

Yep, I read several tire pressure articles, and they said it's very important to check the psi during hot summer months, and let out air, if necessary. I've never done that, but it might be wise. I have never seen that TPM indicator on the dashboard. How low do the tires have to get before it alerts you? And why doesn't it alert when the tires are over-inflated?

 

This reminds me I need to check my tire pressure.

 

Does the TPM have a special valve stem? Mine look normal. And why aren't those 60 PSI dudes getting an alert every day?

The dealer mistakenly set my tires at 33 psi. They always do it wrong. I never got an alert. How low does the pressure have to go before a light comes on... ?

 

It doesn't because it isn't built to. It is only a low pressure warning. And the warning threshold is normally way lower than the normal pressure. The only way to set it is to adjust the tire pressure where you want it, then press the dash button, and it picks an alarm threshold somewhere well below the pressure you've got.

I set mine by inflating all the tires to max sidewall, then pressing the button, then letting the tires back down to the pressures my teeth can stand. That gives me earlier low pressure warnings.

-Chap

 

What dash button??? Where is it? On my car it's probably hidden in all those settings.
(Prius rookie )

 

In the owner's manual! (Well, not the button itself ... you know what I mean.)

-Chap

 

Darn. More reading. But I found it. It's in the vehicle settings on the little screen, up by the speedometer. Thanks.

 

I wonder if the TPMS threshold was set at the factory with the tires at the spec. pressure, and then the tires are aired up to max sidewall, just for shipping. That would make a lot of sense.

 

50 psi? WTH? Isn't the recommended psi supposed to be 36 front 35 rear?

 

One other thing - tyre pressure gauges are notoriously unreliable - old ones get gummed up and read low. The ones in workshops often get abused and end up inaccurate. And don't forget operator error. I always check mine after they've cooled down after a service.

 

I rented a 2018 Prime Advanced with 700 miles on it from my Toyota dealer for a few days. It was a very noisy and harsh ride. I checked the tire pressure and all four were at 50 psi. TPMS never came on.