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Tyre pressures with no passengers
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05-10-2010, 08:41 AM | #1 |
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Tyre pressures with no passengers
I've got the standard 225 msport alloys with factory runflats. I was setting the pressures and noticed on the door card that they differ quite a lot depending on how many passengers I carry. The majority of the time I am on my own, surely I don't have to pump them up with the family in the car then let them down when I go to work on my own? I currently have them set when stone cold as 38psi at the front and 45 at the rear, does this seem ok? I am trying to minimilise outer tyre wear and chances of the alloys cracking.
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05-10-2010, 08:59 AM | #2 |
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If you can live with 45 psi in the rears, all well and good, but inner edge wears is a problem on the rears.
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05-10-2010, 09:03 AM | #4 |
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05-10-2010, 10:22 AM | #5 | |
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Sort of explains it, then we tune pressures for road feel and wear patterns. The main thing is not to run low pressures when loaded and/or driving long distances at high speed. For normal use low pressures usually end up contributing to odd wear and loss of the tyre shoulders. HighlandPete |
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05-10-2010, 12:58 PM | #7 |
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yeah 45 at the rears seems a lil bit high....are u on 18inch? I'm on 40 psi fronts and 42 psi rears...and i got 18s....standard bridgestone runflats...ride is very crashy...but i like it hard! ;-)
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05-10-2010, 03:07 PM | #8 |
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05-10-2010, 03:45 PM | #9 |
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When I had 225 & RFTs on my E91, I found the ride actually better when it was on the door settings (3.0 bar rear). It seemed to get harder with the tyres underinflated. Coupes maybe different of course.
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05-10-2010, 05:22 PM | #11 | |
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E92 with 19" 225s, fronts are 2.7 and rears are 3.2 I think that's pretty much smack in the middle of the minimum/maximum loading stated on the door sticker. |
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05-10-2010, 06:52 PM | #13 |
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I do this too - 2.7 front 3.1 rear, so a little higher than the placard says for light loading.
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