Thread: Are these worn?
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      01-06-2013, 11:23 PM   #21
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Drives: 2008 Jet Black M3 Coupe
Join Date: Feb 2011
Location: Yucca Valley, CA - Kelowna, BC

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2008 BMW M3  [0.00]
2007 Ford E350 4x4  [2.75]
Originally Posted by arter View Post
I would fill them to a lower pressure and then reset the TPM to calibrate it around that pressure. The sensor goes off when the pressure drops about ~ 8-10 psi below the pressure that you set the sensor to. It is a relative pressure measurement system.
I lowered the pressure to about 32 psi. Reset the monitor no problem. Did my 328xi TPMS work the same way?

Cornering I'm getting DSC light action in the dash cluster and I can feel the intervention in turns where I never did before! My front to back diameters are identical currently.

Stock diameters are 25.8 f 26.3 r. A half inch difference.
With the conti's it was 25.8 f 25.5 rear with 275/30 and no DSC issues.
Now with new V12's 25.8 f 25.8 rear with 285/30

Why is the square (diameter wise) setup causing problems? And why didn't the Conti's which were actually smaller than the front?