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XBimmers | BMW X3 Forum > BMW X3 Forums | F25 (2011 - Current) > Second Generation BMW X3 General Forum » How to determine your tire PSI from the manual.

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      11-13-2012, 03:38 PM   #1
egal
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How to determine your tire PSI from the manual.

I have the 369m wheels. The tires are 245/45/19 102v.

In the electronic manual it would appear that the recommended PSI should be 41/46. That seemed high.

I then consulted the owners manual, page 209-210 and there it says 41/46 under full load. 32/38 for partial load.

So that seems like a big difference! Our x3 occupancy stats:
Ave passengers 2.5
Mode=2 Min 1 max 3.

What tire pressure should I fill to? 41/46??
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      11-13-2012, 04:05 PM   #2
faztaz
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I would assume 32/38 is the cold pressure ratings at no load (ie the recommended settings).

I have mine at 34/38 with the same rim/tire package as you.
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      11-13-2012, 04:06 PM   #3
bichoo
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My 369m are at 32/38
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      11-13-2012, 05:56 PM   #4
DonC
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As delivered mine had 34/38
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      11-13-2012, 09:23 PM   #5
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I set my winter tires to 32/25 f/r

18" wheels and tires

I do notice a fair bit of tramlining on rutted roads with the winter tire at the specified pressure.
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      11-14-2012, 01:05 AM   #6
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Quote:
Originally Posted by lbjgh View Post
I set my winter tires to 32/25
Is it typo?
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      11-14-2012, 05:45 AM   #7
Nahoa
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Depends on your driving and your goal. I prefer a firmer ride, less movement, and a greater ability to absorb impact, so I run them on the higher end of the range. Mine are currently set at 38/41.
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      11-14-2012, 08:44 PM   #8
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haha, yep. 32/35.
Quote:
Originally Posted by April1 View Post
Is it typo?
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      11-16-2012, 09:04 AM   #9
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Thank you, I will adjust on your recommendations! I did set it to the 40's, it just didn't seem right. I'll move it back to the 30's.
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