06-05-2014, 07:08 AM | #2 |
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Drives: 2011 e91
Join Date: Jan 2013
Location: Calgary, AB, Canada
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You wear your tires.
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2011 E91
2016 M2 - Sold 2014 X1 - Sold 2002 Land Rover Discovery II - 3" lift & 33s |
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06-05-2014, 11:15 AM | #5 | |
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Quote:
HOwever, The tires you have and whether you have staggered or not comes into play. My staggered 8x18 and 9x18 with P7 performance tires likes maximum 38 front and 42 rear filled cold approx 70 deg f which is what the book says for MSport at over 100 mph. I tested with heat laser on track, and with 38 psi all around, and that translates to about 44-45 hot all around, but that made car understeer somewhat. IMO that BMW's PSI sticker on door is accurate while lots of other cars aren't. My staggered needs 1 to 4 more psi in rears to get closer to neutral. |
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06-05-2014, 06:26 PM | #7 |
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06-07-2014, 10:08 AM | #8 |
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Assuming a less than full load (I suspected that the 41 in the rear was a CYA for that eventuality), I've been running 35 all the way around; the understeer seems less noticeable.
Experiment and see what works. Moon |
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06-14-2014, 05:49 PM | #9 |
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18x8.5 all around staggered 235x45 & 265x40 air is 34 f and 36 r. This is around town light loads. Plus 2 pounds highway speeds.
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