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      12-16-2020, 01:01 PM   #1
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What tire pressures are you running on your winter setup?

I'm currently running 43 PSI on all four corners of my square set up of the following:

-20x9 +30
-265/45-20

(My OEM wheels are 22" 742Ms)

According to the computer, pressures of 42 PSI are recommended.

Would like to see what pressures everyone is running on their 21" and 22" setups, whether they are square or staggered!
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      12-16-2020, 01:03 PM   #2
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Quote:
Originally Posted by bforbrian View Post
I'm currently running 43 PSI on all four corners of my square set up of the following:

-20x9 +30
-265/45-20

(My OEM wheels are 22" 742Ms)

According to the computer, pressures of 42 PSI are recommended.

Would like to see what pressures everyone is running on their 21" and 22" setups, whether they are square or staggered!
I run whatever the car recommends once you set the sizes correctly. 43psi sounds ok for the rear, but too high for the front on that basis. Double check your tire setting in iDrive.
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      12-16-2020, 01:13 PM   #3
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Quote:
Originally Posted by LexxM3 View Post
I run whatever the car recommends once you set the sizes correctly. 43psi sounds ok for the rear, but too high for the front on that basis. Double check your tire setting in iDrive.
Even for a square setup? In the US I believe 20" OEM wheels are staggered, hence the computer instructs owners to maintain different pressures front and rear. However, there isn't an option to select identical sizes on all four corners, which is why I set the same pressure all around.
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      12-16-2020, 01:22 PM   #4
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Quote:
Originally Posted by bforbrian View Post
Quote:
Originally Posted by LexxM3 View Post
I run whatever the car recommends once you set the sizes correctly. 43psi sounds ok for the rear, but too high for the front on that basis. Double check your tire setting in iDrive.
Even for a square setup? In the US I believe 20" OEM wheels are staggered, hence the computer instructs owners to maintain different pressures front and rear. However, there isn't an option to select identical sizes on all four corners, which is why I set the same pressure all around.
Yap, my setup is 20" square, but after-market, not BMW, rims. Here is the car setup (cold). My fronts are a bit high, been meaning to adjust.

Hm, but now that you mention it, the computer does indicate that "it will determine front wheels automatically" and I now wonder what it thinks I have on the front? Hm. Will investigate further.
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      12-17-2020, 08:45 AM   #5
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I've asked my dealer to excavate a formal answer from BMW regarding what the car is assuming is on the front with my settings. No answer yet (and I give it a max 20% chance of ever getting one), but in the meantime, playing with every available combination of 20" winter wheel setups in iDrive, it always recommends 33psi front and 41psi rear cold. The settings don't make any difference, at least not cold. FWIW to OP's question.
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      12-17-2020, 09:03 AM   #6
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Quote:
Originally Posted by LexxM3 View Post
I've asked my dealer to excavate a formal answer from BMW regarding what the car is assuming is on the front with my settings. No answer yet (and I give it a max 20% chance of ever getting one), but in the meantime, playing with every available combination of 20" winter wheel setups in iDrive, it always recommends 33psi front and 41psi rear cold. The settings don't make any difference, at least not cold. FWIW to OP's question.
.
Yeah I presume it's because the computer always recognizes the 20" set up as a staggered setup. Thanks though - helpful to know.
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      12-18-2020, 01:14 AM   #7
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Quote:
Originally Posted by bforbrian View Post
Even for a square setup? In the US I believe 20" OEM wheels are staggered, hence the computer instructs owners to maintain different pressures front and rear. However, there isn't an option to select identical sizes on all four corners, which is why I set the same pressure all around.
According to the 2021 price guide, the 20s are a square setup (738 optional are square and 740m m50i standard are square).
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      12-18-2020, 08:55 PM   #8
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What's of further interest is that the rears also change from 41psi to 43psi. I am assuming it changes based on weather, but haven't found the threshold yet for the increase to 43psi. Fronts never change though from 33psi.
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      12-18-2020, 09:38 PM   #9
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Quote:
Originally Posted by BHCJJS View Post
What's of further interest is that the rears also change from 41psi to 43psi. I am assuming it changes based on weather, but haven't found the threshold yet for the increase to 43psi. Fronts never change though from 33psi.
The recommended pressure doesn't change with weather, but it does change with tire temperature (which is related to outside ambient temperature and, obviously, driving loads). As tire temps go up, actual pressure goes up and the associated recommended pressure goes up as well. This makes sense. My fronts go up in recommended temperature as they warm up as well as the rears.
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      12-19-2020, 10:32 AM   #10
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Quote:
Originally Posted by BHCJJS View Post
What's of further interest is that the rears also change from 41psi to 43psi. I am assuming it changes based on weather, but haven't found the threshold yet for the increase to 43psi. Fronts never change though from 33psi.
I can confirm this. I have seen the recommended pressure for the rear change between 41 to 43 psi.
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      12-19-2020, 02:31 PM   #11
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The reason you only put the rear axle in the idrive is because it then knows what you have on the front. If you put the 20 summers it gives you the staggered set up. Change it to winters and it automatically assumes a square set up.The rear axle is always the widest for the staggered set up so it knows. The only time it would be different is if you go non OEM and have some completely different set up.
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      12-20-2020, 03:39 AM   #12
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Originally Posted by Pro55 View Post
The reason you only put the rear axle in the idrive is because it then knows what you have on the front. If you put the 20 summers it gives you the staggered set up. Change it to winters and it automatically assumes a square set up.The rear axle is always the widest for the staggered set up so it knows. The only time it would be different is if you go non OEM and have some completely different set up.
Are you assuming this (that winter 20" setting configures as a square setup internally) or is there formal BMW documentation somewhere per this description? Would love to have something formal rather than guesses and conjectures.
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      12-30-2020, 01:12 PM   #13
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Ive attached a snap from wheel size.com This is for Europe G05 30D . Each model gets different entry but fundamentally they are the same. As you can see the 20 wheels are staggered for summer but square for winter.
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      05-28-2021, 11:53 AM   #14
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Quote:
Originally Posted by LexxM3 View Post
Here is the car setup (cold). My fronts are a bit high, been meaning to adjust.

.
I know this is an old post. When I look under my Tire Pressure Monitor I don't see anything that says "recommended". It just shows me actual pressure and an option to change tires to different size. How do I get the "recommended" other than looking at the sticker on the door.
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      05-28-2021, 04:25 PM   #15
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Quote:
Originally Posted by GREENPUS View Post
Quote:
Originally Posted by LexxM3 View Post
Here is the car setup (cold). My fronts are a bit high, been meaning to adjust.

.
I know this is an old post. When I look under my Tire Pressure Monitor I don't see anything that says "recommended". It just shows me actual pressure and an option to change tires to different size. How do I get the "recommended" other than looking at the sticker on the door.
2021 X6 xDrive40i
Is there a chance you've configured "Other" for your tires? In that case, it doesn't know what to recommend and just assumes the pressures you've set at TPMS initialization are the right ones and monitors to those settings.

Another possibility is that your car doesn't have TPMS but rather the inertial relative tire pressure monitoring. I had originally assumed (a while back) that all G05 has TPMS in all markets, but it did come out that some markets had inertial (old-style, a la E46 for example) monitoring. I'll try to dig up the posts on this from at least a year ago. But considering you're in US, this latter theory doesn't seem likely.
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      05-28-2021, 07:33 PM   #16
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Quote:
Originally Posted by LexxM3 View Post
Is there a chance you've configured "Other" for your tires? In that case, it doesn't know what to recommend and just assumes the pressures you've set at TPMS initialization are the right ones and monitors to those settings.

Another possibility is that your car doesn't have TPMS but rather the inertial relative tire pressure monitoring. I had originally assumed (a while back) that all G05 has TPMS in all markets, but it did come out that some markets had inertial (old-style, a la E46 for example) monitoring. I'll try to dig up the posts on this from at least a year ago. But considering you're in US, this latter theory doesn't seem likely.
Its a US built 2021 X6 with factory 22 inch wheels. Factory installed. The tire monitor is set to 22 inch. I didnt look to see what is under the "other" option. I assumed it was TPMS
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      06-13-2021, 01:27 PM   #17
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LexxM3 I got the recommended tire pressure to show. The tire setting was correct. It was set to the 22 inch tires. I selected "other" and then flipped it back to 22 inch.
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