How low do u run tire pressure for comfort

[CTruck_BMW]

How low do u run tire pressure for increased comfort on the refresh MS?

I have 19", and I hate how solid/firm the ride is at the recommended 42 PSI. Am running them at 36-37 PSI much better comfort; just curious what others are doing?

 

[quickstrike12]

I’m glad you asked this. I have been curious about this as well. I’ve always run lower than the recommended for ride comfort. I’m at 41 psi on my factory 19” wheels. Haven’t seen any ill effects at all in tire wear. I rotate fairly regularly and keep an eye on them.
i go back up to recommended pressure when going on any road trip where range may be a factor.

 

[krsgio]

Not sure where you live but I'm pretty sure that's fairly close to the TPMS threshold before you start getting warnings. Once weather becomes colder here that would possibly trigger the low tire alert. I run higher pressures to optimize my efficiency so I'm usually around 42 on 20" wheels.

 

[quickstrike12]

You’re absolutely correct. I set them cold with no recent driving and then I typically have to adjust as it gets colder here in Texas. 41 is right on the edge of the warning

 

[ATPMSD]

The most dangerous thing you can do with car tires is to run them at low pressure. They should not be lower than the recommended 42 PSI "cold." BTW, you have air suspension in the Model S so just set the ride to comfort.

5 Effects Of Low Tire Pressure & How To Avoid Them

Keep your drivers and vehicles safe and your company running smoothly by understanding the effects of low tire pressure and how to avoid them.

forcebymojio.com

 

[maximizese]

The most dangerous thing you can do with car tires is to run them at low pressure. They should not be lower than the recommended 42 PSI "cold." BTW, you have air suspension in the Model S so just set the ride to comfort.

5 Effects Of Low Tire Pressure & How To Avoid Them

Keep your drivers and vehicles safe and your company running smoothly by understanding the effects of low tire pressure and how to avoid them.

forcebymojio.com

I think you mean to warn against running tires at TOO low of a tire pressure. Dropping tire pressure below the recommendation on the placard can be done for added comfort and for added traction (especially in sand, dirt, gravel, snow). Adding tire pressure at or slightly above the recommendation can be done when towing or carrying a heavier load, increasing efficiency (especially on the highway). Never exceed the maximum pressure printed on the tire sidewall. Typically I'd recommend somewhere between 38-46 PSI depending on what you're doing.

 

[ATPMSD]

I think you mean to warn against running tires at TOO low of a tire pressure

How low it too low? From the link: “A tire blowout is the most dangerous risk associated with low tire pressure. “

for added traction (especially in sand, dirt, gravel, snow)

This is a special case since you are not running at highway speeds.

But personal choice of course.

 

[Beandoc]

41 psi on 21s. Always drive low suspension in Sport. Car feels comfortable to me.

 

[jadatis]

Look at this topic, in wich I give lists and explanation.

Change of tyre pressure if using 255/50/19 107Y due to higher load rating

But tmps alarm is a secundary problem. Porche uses lower alarmsettings if comfort setting used. Mayby Tesla too.
Once the signal of sensor is receved in the receving unit, its a matter of software programming.

 

[DerbyDave]

Doesn't the TPMS warning change if you set the cold tire pressure where you want it, and then Calibrate TPMS using the control panel? This is the way it has worked with all my other cars. I agree that the suspension should be set to comfort instead of lowering tire pressure. Tesla spent alot of money to calibrate the cold tire pressure recomendations for both safety, comfort, and best tire wear. There are warnings everywhere about low tire pressure, plus not going over the maximum pressure listed on the tire sidewall.

 

[jadatis]

I dont believe Tesla spent a lot of effort in tire pressure recommendation, yust high for high actiradius, and that comfort and gripp sucs then, they dont care about.

Did you have mayby indirect low pressure message in your former cars?
They can be reset even if you give all tires much to low pressure. They use ABS sensors to detect higher rotation speed of one wheel.

For tmps with sensors in the wheel, its yust what the programmer of the software for the receving unit, thought best. Some allow only a fixed low pressure allarm.
Then an update of software is only way to set a lower pressure allarm, mayby ilegal, so warranty of Tesla is voided.

 

[tldickerson]

Not all Tesla's have a comfort settings like some of you have posted.

 

[DerbyDave]

It's hard to read your message, but tpms in all other cars, you set the delta in calibrating YOUR chosen air pressure. When the pressure falls so many points, the display tells you you have a low tire. The delta is not programmed in by Tesla, but is set in the calibration process by the user.

 

[Yelobird]

I dont believe Tesla spent a lot of effort in tire pressure recommendation, yust high for high actiradius, and that comfort and gripp sucs then, they dont care about.

Did you have mayby indirect low pressure message in your former cars?
They can be reset even if you give all tires much to low pressure. They use ABS sensors to detect higher rotation speed of one wheel.

For tmps with sensors in the wheel, its yust what the programmer of the software for the receving unit, thought best. Some allow only a fixed low pressure allarm.
Then an update of software is only way to set a lower pressure allarm, mayby ilegal, so warranty of Tesla is voided.

So don’t understand any of what you wrote sorry.

 

[zoomer0056]

Not all Tesla's have a comfort settings like some of you have posted.

This is a Model S thread. Do early Model S not have this setting?

 

[DerbyDave]

This is a Model S thread. Do early Model S not have this setting?

Until, i think it was 2016, there was no adaptive suspension.

 

[ATPMSD]

Until, i think it was 2016, there was no adaptive suspension.

Found this:

”The Model S Smart Air Suspension was an option in 2014, and it became standard for all Model S trims from 2017 to mid-2019.”

 

[krsgio]

Don't think the comfort mode and all those settings came along until the Raven so around 2019.

 

[RichardL]

The early air suspension only allowed you to raise or lower the ride height. It did nothing to adjust the stiffness/comfort etc.

 

[DayTrippin]

Just look at the load inflation pressure tables to see how safely you can go. Here is one for the tires I am running on my Plaid. Look up the max axle weight for your car's weight (placard on car), divide by 2 and add a buffer to be safe. Then check the tire pressure you plan on running.

Tire Size	26 psi	29 psi	32 psi	35 psi	36 psi	38 psi	41 psi	42 psi
295/35R20 101 SL	1393 lbs	1521 lbs	1647 lbs	1768 lbs	1819 lbs (101 SL)
295/35R20 105 XL	1387 lbs	1515 lbs	1638 lbs	1759 lbs	1801 lbs	1881 lbs	1997 lbs	2039 lbs (105 XL)

295/35R20 Tire Pressure Chart - TirePressure.com

Find corresponding tire load capacity at specified tire inflation pressures for 295/35R20 tires to maintain proper tire inflation for a safe drive.

tirepressure.com