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      07-01-2013, 07:50 PM   #15
dmppdx
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Drives: 2011 E90 M3
Join Date: Nov 2011
Location: PNW

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[quote=KennyPowers;14251584]
I also think that the weight difference between the two is negligible.

QUOTE]

From what I have seen for actual acceleration tests of different tire weights, its pretty negligible so it seems like it would have to be a placebo effect since your butt dyno isn't sensitive to a few percentages for a difference of 4-5 pounds a corner.

Tires also have different feels with regard to feeback and responsiveness which could impact how "fast" a car feels doing things like winding through curves even though there is no real actual difference.