How low do u run tire pressure for comfort

[jadatis]

That list in former post is calculated with a safe formula, but no reserve build in, and is for max 160kmph/99mph.

In the lists I make and given in the topic I linked to in my first post here, I use an even safer formula that leads to lower loadcapacity for the pressure, and give 90% of that

I determined that to give maximum reserve at wich comfort and gripp is still acceptable.

Can make lists here too if wanted, yust give loadindex and if XL or not, and if you want in KG or LBS, and Bar or PSI.
and fir what max speed used.

 

[KalJoMoS]

Can make lists here too if wanted, yust give loadindex and if XL or not, and if you want in KG or LBS, and Bar or PSI.
and fir what max speed used.

Yes, please. You can start from 245/45 R19/102y, but I believe load index 96 is also acceptable.

 

[AAKEE]

The set tyre pressure recommendation is of course a part of the EPA rating.

Tesla had of course found the optimum pressure where the consumtion is low and the comfort stil is acceptable.

Lowering the pressure slightly will not be unsafe but it will most probably increase the consumption.

Warnings about running with “too low tyre pressure” do not mean having a couple of PSI lower than the recommended pressure.

I did regularly run my M3P with 1-2 PSI higher cold pressure then recommended, due to the climate I live in (ensures the pressure not dropping below the recommended on a clear summer night where the temperature drops from 25-30C on the day to 10C.)

On my MSP i so far has tried to stick to the recommendation as close as possible, this to make sure I do not induce any issue with the tyre wear. (MS rear tyre inside wear another question then here I guess).

 

[jadatis]

Yes, please. You can start from 245/45 R19/102y, but I believe load index 96 is also acceptable.

First googled the size, and only found XL in 102 loadindex.
So your tires are LI 102 / maxload 850kg/ 1874 lbs AT 42 psi ( 2.9 Bar) upto 99mph/160kmph.
Official system is Y upto 220kmph/??mph but this " pigheaded Dutch selfdeclared tyrepressure specialist" dont believe that, so keep using 160kmph for all speedcodes above Q.

Made the list for axleload, so you dont have to devide yourselfes by 2.
And gives that 90% for max reserve with still acceptable comfort and gripp, and still reasonable energy-use.

So seach back your 99% acurate determined axleloads back in the list for the needed cold pressure.
Determining the axleloads is the most tricky part in it all, and your responcibility ( disclaimer)
For more explanation, see the other topic I gave link of.


In front of cold psi ( at 65 to 70 degrF/ 18 to 21 degrC) in kg and behind in lbs. Because this is an international forum.
Can also make a list for Bar.

Axleload/cold psi/ axleload
720 kg/ 18 psi / 1588 lbs
754 kg/ 19 psi / 1664 lbs
789 kg/ 20 psi / 1740 lbs
823 kg/ 21 psi / 1815 lbs
857 kg/ 22 psi / 1891 lbs
892 kg/ 23 psi / 1966 lbs
926 kg/ 24 psi / 2041 lbs
960 kg/ 25 psi / 2116 lbs
994 kg/ 26 psi / 2191 lbs
1028 kg/ 27 psi / 2266 lbs
1061 kg/ 28 psi / 2341 lbs
1095 kg/ 29 psi / 2415 lbs
1129 kg/ 30 psi / 2489 lbs
1162 kg/ 31 psi / 2564 lbs
1196 kg/ 32 psi / 2638 lbs
1230 kg/ 33 psi / 2712 lbs
1263 kg/ 34 psi / 2785 lbs
1297 kg/ 35 psi / 2859 lbs
1330 kg/ 36 psi / 2933 lbs
1363 kg/ 37 psi / 3006 lbs
1397 kg/ 38 psi / 3080 lbs
1430 kg/ 39 psi / 3153 lbs
1463 kg/ 40 psi / 3226 lbs
1496 kg/ 41 psi / 3300 lbs
1530 kg/ 42 psi / 3373 lbs/ referencepress
1563 kg/ 43 psi / 3446 lbs
1596 kg/ 44 psi / 3519 lbs
1629 kg/ 45 psi / 3591 lbs
1662 kg/ 46 psi / 3664 lbs
1695 kg/ 47 psi / 3737 lbs
1728 kg/ 48 psi / 3809 lbs
1760 kg/ 49 psi / 3882 lbs
1793 kg/ 50 psi / 3954 lbs
1826 kg/ 51 psi / 4027 lbs/ mostly max allowed cold given on sidewall.

 

[jadatis]

Some feedback after a while would be nice.
About energy-use, comfort and tyre-wear.
I suspect for people with a heavy foot, to give lesser tyrewear, because better gripp, so lesser slipping.

And if you have other size, first look in the other topic if already given, and if not, give loadindex and if XL or not here.

This list can be used for every XL with loadindex 102, even if other size, but not for Standard load ( AT 36 psi), for those I have to make another list.