Tire Pressure

[kens]

Yes, mine does that too

It's a feature, not a bug.

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[Teslaeata]

Should have also added the caveat that 44 is according to the TPMS, I'm curious how accurate that is....

In any case, my last pressure guage broken recently and I was in the market for a new one anyway, new one will be arriving tomorrow, as soon as it does I'll lower the pressure to 39psi....

Interesting!

I check pressures with a calibrated gauge and compare with TPMS and find it to be about same though it has to be said TPMS may need a little time to catch up if pressures are altered.

Therefore you should not because you cannot rely on the TPMS in real time when adjusting pressures.

If pressures are higher than maker’s recommendations for the usual load you run at, I would adjust pressures when tyres are at normal ambient temperature.

5psi either way should not cause premature tyre wear, mine can alter up to 5psi on a run and start at higher end of range.

Adjusting them may help your “bumpy” ride even if only by placebo effect?

Significant over inflation can cause premature & uneven wear in centre of tread and significantly under inflated tyres wear more quickly on both outer shoulders of a tyre.

Seriously doubt 5psi is enough to have a discernible or measurable effect on wear, or I would always be renewing tyres and I just am not.

I often find I’m running at around 40/52 f/r when out & about on long runs having set pressures to 37/49 as I’m nearly always fully loaded.

Attached are overnight pressures.

I don’t experience this hard ride I hear people complain about even with my higher pressures.

In terms of tyre wear, maintaining inflation pressures is essential to wear and economy, higher pressures will provide better economy (range) than lower ones.

There also is value in having full 4 wheel alignment checks carried out periodically to safeguard against premature tyre wear and aid range economy.

I have rear camber angles adjusted right to the positive end of the range because I run fully loaded most of the time which does help prevent inner shoulder wear.

Hope this all is of some use.

 

[ChrisO]

I find my TPMS to be very accurate. I don't fill the tires based on it though because as it says, it isn't real time. I fill based on a gauge and then check after all the tires are inflated.

Of course, the tires don't tend to cooperate with this over time. For instance, the one below at 40 PSI (which was filled to 39 PSI at the same time as the others, and the TPMS said so too at the time).


 

[Teslaeata]

I find my TPMS to be very accurate. I don't fill the tires based on it though because as it says, it isn't real time. I fill based on a gauge and then check after all the tires are inflated.

Of course, the tires don't tend to cooperate with this over time. For instance, the one below at 40 PSI (which was filled to 39 PSI at the same time as the others, and the TPMS said so too at the time).


There’s a bit of rounding going on there, I suspect.

 

[Chiefwino]

Slightly higher tire pressure (not significantly over inflated) can decrease rolling resistance, which reduces the energy needed to move the vehicle and thus improves efficiency. However, the ride will be stiffer/bouncier.

 

[tpsfoto]

Mine came from the dealer, set at 42 when I picked it up

 

[Teslaeata]

Slightly higher tire pressure (not significantly over inflated) can decrease rolling resistance, which reduces the energy needed to move the vehicle and thus improves efficiency. However, the ride will be stiffer/bouncier.

Bang-on.

The converse is also true, lower tyre pressure softens the ride, increases rolling resistance so reduces range as misaligned wheel alignment will also reduce range.

 

[Skip Towne]

I had the3 same situation - tires at 44 PSI when getting the car from the dealer. Car had annoying bouncy /too firm ride. By too firm, I can compare to sports sedans and pickups in my personal fleet.

I reduced the pressure to 39 and the ride dramatically improved. Frankly, I was surprised the difference a few PSI would make.

Lastly, on these cars it seems more important than others, to make sure to change the air. Winter air is definitely a problem as spring comes into season. Changing the tire air twice a year is one of the few maintenance things I need to do to my Mach-e - so its gets all my maintenance attention.

 

[highland58]

I had the3 same situation - tires at 44 PSI when getting the car from the dealer. Car had annoying bouncy /too firm ride. By too firm, I can compare to sports sedans and pickups in my personal fleet.

I reduced the pressure to 39 and the ride dramatically improved. Frankly, I was surprised the difference a few PSI would make.

Lastly, on these cars it seems more important than others, to make sure to change the air. Winter air is definitely a problem as spring comes into season. Changing the tire air twice a year is one of the few maintenance things I need to do to my Mach-e - so its gets all my maintenance attention.

Don't forget to use 78% nitrogen.

 

[DonM]

I also have a '24 Preimum AWD and it came to me at 42psi. I reduced it to 38 and it's much less bouncy. It's still bouncy, mind you, but not like a tennis ball on a racket any more. My plan is to wait until any tire reads 36, then inflate them all back up to 38.

 

[ChrisO]

I was curious and looked up how much it increases while driving they said it is about 2 to 4 PSI. Of course, that depending on a lot of factors, like what kind of driving, and even the weather. So, in reality that is what you are really riding on for the most part.

On the subject of dealer or other people inflating tires, I certainly wouldn't consider them the "authority" on it. For instance, I doubt any of them even thinks of "cold temperature pressure", they can't wait for your tires to cool off. From what I see they tend to over inflate be a bit. Ford is the "authority" and they tell you what they think it should be on the driver's door jam and in the App.

 

[stinsvic]

Dose anyone else's TPMS readings in FordPass do this little sway/inflate motion?

Jiggly!!!

 

[ChrisO]

Jiggly!!!

Mine doesn't do that. I'm using Android. Are you using iOS? That might be the difference.

 

[Teslaeata]

Don't forget to use 78% nitrogen.

Anybody ever tried 20/21% Oxygen, made a load of difference to my headlight brightness ?

 

[kens]

Mine doesn't do that. I'm using Android. Are you using iOS? That might be the difference.

Yes, it's iOS.

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