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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > question about tire pressure



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      03-04-2008, 04:27 PM   #1
fermion
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question about tire pressure

i have a 328i non sport (16" + all seasons)

what is the best way for me to check tire pressure? is it okay to assume my tire pressure is okay if i don't get a TPMS warning or should i check manually with a gauge?

like, how far from optimal tire pressure does the tire have to be before the TPMS is triggered?
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      03-04-2008, 04:38 PM   #2
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eh I never checked my air pressure when I was on RFT but now that I'm on non rft i usually check them once every 2 months although I have TPMS on them as well i just do it when I'm bored lol
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      03-04-2008, 04:49 PM   #3
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i check mine about once a week. i'm just that anal
i would check it manualy. for example when i got my car back from the dealer (i just don't trust them) they where way over inflated
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      03-04-2008, 05:47 PM   #4
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Every month or two should be enough.
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      03-04-2008, 06:09 PM   #5
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I check mine just about every other morning. Better safe (and anal), than sorry.
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      03-04-2008, 06:58 PM   #6
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what year is your car? you may just have the FTM (indirect TPMS), which all that does is use ABS data to make sure the wheels are spinning at relatively the same rate, and not actually taking an internal pressure reading.

in the winter, i check my tire pressure once every few weeks.
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      03-04-2008, 07:51 PM   #7
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As a rule, once a month unless there are large temperature changes. If you remember basic physics, for every 10 degrees of temperature rise, the pressue in the tire goes up a pound or two. Yesterday, in Pittsburgh, it was 70 degrees and tomorrow it will be 36.

Gary
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      03-05-2008, 11:06 AM   #8
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As a follow up what should the target tire pressure be?

Is it different for low profile 19" rims?
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      03-05-2008, 11:30 AM   #9
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Originally Posted by DrPowers View Post
As a follow up what should the target tire pressure be?

Is it different for low profile 19" rims?
I assume for a 325i? Here you go.
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      03-05-2008, 11:31 AM   #10
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i check my tire pressure manually (because i think it's more accurate anyway) about once every 3 weeks to a month... i usually use my electric air pump to top up the pressure if there is insufficient pressure.
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      06-14-2008, 12:42 AM   #11
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I do it at least once a month.
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