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      11-09-2011, 04:02 AM   #23
S70IP
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I checked my tire pressures with two separate gauges.

Both said the same 40 psi. 17 inch 99Y run flats.
Way higher than the 2.2 bar. Went to the dealer service department and asked WTF? Car only 3 weeks old.
They said with the run flat 40 psig (2.8 bar) is the best as they have found the walls get warn and the shape is better. They said leave the tires at 40 psig.

Opinions?
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      11-09-2011, 04:25 AM   #24
clivem2
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Quote:
Originally Posted by S70IP View Post
I checked my tire pressures with two separate gauges.

Both said the same 40 psi. 17 inch 99Y run flats.
Way higher than the 2.2 bar. Went to the dealer service department and asked WTF? Car only 3 weeks old.
They said with the run flat 40 psig (2.8 bar) is the best as they have found the walls get warn and the shape is better. They said leave the tires at 40 psig.

Opinions?
Mine were up that high too. I'll ask the dealer next week why they do this.
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      11-09-2011, 05:57 AM   #25
JOHNBMWM5
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I would run mine @ 37PSI all round. 32PSI is way too low for run flats.
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