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Technical Topics Wheels and Tires 225/40/19 Square summer on 19x8's

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      05-11-2021, 07:39 PM   #1
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225/40/19 Square summer on 19x8's

Is this a factory option on the G20, and if so, what are the pressures listed on your door label?

I just ditched my A/S run flats right off the lot on my G23 and my owners manual only lists all seasons, winters and summer staggered set-ups, no square summer pressures to be found.

Thanks in advance.
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      05-11-2021, 09:14 PM   #2
Merami fan
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Closest I see in the G20 owner's manual is 225/40 R 19 93 H XL A/S.

330:
35 front/41 rear <100mph
38 front/45 rear over 100mph

M340:
38 front/42 rear <100mph
41 front/46 rear over 100mph

But that's for G20. You said G23. If you open the DRIVER'S GUIDE app, the full owner's manual is under the PDF Manuals section.

Would summers require a vastly different inflation pressure than A/S? You could try a few different pressures, maybe keeping about the same difference between the front and rear.
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Last edited by Merami fan; 05-11-2021 at 09:23 PM..
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      05-11-2021, 10:42 PM   #3
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Quote:
Originally Posted by Merami fan View Post
Would summers require a vastly different inflation pressure than A/S? You could try a few different pressures, maybe keeping about the same difference between the front and rear.
Thank you for the info and direction, excellent idea.

Yes, summer vs. A/S is the question. There is currently a 6psi difference with A/S (36/42 <100).

Im a B48, which according to the manual requires less pressure on the front than a B58. Its not comparing apples to apples because Im a vert, which may or may not effect rear pressure because of the additional weight for the hydraulics, etc.

IDrive 7/B48/G23 only recognizes square A/S, summer staggered or winter, thus the reason Im looking for suggestions, which again may or may not apply to my specific set-up.
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