10-13-2021, 01:28 PM | #1 |
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Tire Pressures on G80 xDrive
I had never checked my tire pressures since I got mine from the dealership a few weeks ago. My tire pressure sensor went off today and when I checked, the back was at 47psi (I had driven about 5 miles). Seemed quite high to me, but when I checked the manual, it said for speeds in excess of 100mph, you should use 41psi in the front and 45psi in the back, so 47psi is not so unreasonable. The pressures for less than 100mph are 32psi in the front and 35psi in the back. Since my tire pressure sensor was going off, I decided to let some of the pressure out. I'm currently at 40psi on all my tires and trying to decide what to do. I could lower it all the way down to 32/35psi, but I do tend to go fast when it's safe and then I would want the higher pressures. I'm new to all this, so any advice would be appreciated. 40psi seems like a happy middle ground to me for now...
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10-13-2021, 02:09 PM | #2 | |
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10-13-2021, 02:14 PM | #3 |
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I thought the recommended 100mph+ tire pressures were 32 front 37 rear.
[EDIT] Maybe it's different for cars with increased V-Max? Mine is limited to 155. |
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10-13-2021, 02:47 PM | #5 | |
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10-13-2021, 02:54 PM | #6 | |
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10-13-2021, 03:13 PM | #8 | |
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10-13-2021, 03:38 PM | #9 | ||
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189 mph 33 psi ZX10R |
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10-13-2021, 03:50 PM | #10 |
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I tend to run higher than the recommended pressures for the same reasons you state. Generally, lower tire pressures lead to a more comfortable ride, with more tire wear - but generally it's better to err on the side of too high rather than too low.
Higher pressure are better for handling, better fuel economy, and less tire wear. So why not err on the side of higher? As long as you can tolerate the ride. Also, in the winter the pressure tends to drop as the weather gets colder, so having a few extra psi isn't bad. I can't speak to pressures well over 40 psi or speeds >155. I think in those ranges all bets are off. I tend to find 36-38 psi is the sweet spot for me.
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10-13-2021, 05:24 PM | #11 | |
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08-01-2022, 03:22 PM | #12 |
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Interesting... Mine says 32 (F), 33 (R)... I have the PS4s. I had mine set on >100 and the TPMS light kept going off w 32/33. I was trying to figure out why the light kept going off. Now I know why lol.
Does anyone keep their tire settings @ >100??
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08-01-2022, 03:39 PM | #13 |
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We have a G80 which came with Pirellis and the sticker says 32/35 and and G82 with Michelins which says 32/32. Both are identically equipped Competition xDrives without M Drive Pro. March '22 and November '21 builds.
How is the TPMS calibrated?
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'22 G82 xDrive BSM
'22 G80 xDrive BSM - Wife's '15 F82 BSM - sold '08 E92 M3 BSM - sold '02 E46 M3 CB - sold Last edited by Dundas; 08-01-2022 at 08:46 PM.. |
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09-16-2023, 08:23 AM | #14 | |
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09-17-2023, 10:06 AM | #15 |
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Mine is a uk G80cx and door says 32 front and rear. I can’t remember the settings for over 100mph. Idrive only wants to know size and summer or winter not make. I saw the US manual and this had a lot more tyre pressures listed.
I agree with the various track comments on pressures. However, for roads I would not over inflate as this leads to a smaller contact patch and understeer. |
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09-17-2023, 10:14 AM | #16 |
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I would assume 100mph is hot tire temps so pressure will increase. I go out at 28lbs cold and they heat up to upper 30s after a few laps and temps about 140s
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09-21-2023, 08:32 PM | #18 |
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32 all around
running 40+ is for autobahn driving, managing tire temps during extended periods over 100, not a quick run up |
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