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      08-03-2014, 07:10 PM   #4
gthal
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Drives: 2018 340i xDrive
Join Date: Jul 2007
Location: Canada

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I always start 5 to 6 psi less than normal and then gauge from there. To me, it's all about measuring sidewall rollover. Too much rollover and you increase pressure. None at all (that is, wear is not coming to the outer edge of the tread) or the car feels too unstable and I lower it a bit. If you are a baller and have a pyrometer to measure temp across the tread that's even better. Given the F82 is 32 psi, I will like start with 28 and see where that ends up and adjust from there.

Going above the normal street pressure that will only result in too much centre wear, less traction and a car that is way too darty.
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