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      02-08-2012, 10:33 PM   #9
///M1
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Drives: Many
Join Date: Feb 2009
Location: North of 4K RPM

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Robert, here are some statistics perhaps to help you in your decision when it comes time for it (at least from a dimension standpoint):

Stock fitment front: 245/35/19
Sidewall: 3.4
Radius: 12.9
Diameter: 25.8
Circumference: 80.9
Revs/Miles: 783

Going to 265/30/19
Sidewall: 3.1
Radius: 12.6
Diameter: 25.3
Circumference: 79.4
Revs/Miles: 798

Speedometer reading with non-stock tire is 1.9% too fast (when traveling and your speedo is reading 60mph, you are actually going 58.9mph)

Going to 255/35/19
Sidewall: 3.5
Radius: 13
Diameter: 26
Circumference: 81.8
Revs/Miles: 775

Speedometer reading with non-stock tire is 1.1% too slow (when traveling and your speedo is reading 60mph, you are actually going 60.6mph)

*******************

Stock fitment rear: 265/35/19
Sidewall: 3.7
Radius: 13.2
Diameter: 26.3
Circumference: 82.6
Revs/Miles: 767

Going to 295/30/19
Sidewall: 3.5
Radius: 13.0
Diameter: 26.0
Circumference: 81.6
Revs/Miles: 777

Speedometer reading with non-stock tire is 1.3% too fast (when traveling and your speedo is reading 60mph, you are actually going 59.2mph)

Going to 285/30/19
Sidewall: 3.4
Radius: 12.9
Diameter: 25.7
Circumference: 80.8
Revs/Miles: 784

Speedometer reading with non-stock tire is 2.2% too fast (when traveling and your speedo is reading 60mph, you are actually going 58.7mph)
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2011 BMW E82 1///M: AW, all options; Renntech, Akrapovic, Forge, P3, RevoZ CF bits, many mods
1988 BMW E30 M3: Hennarot, S14, stock
2016 Porsche 981 GT4: Guards Red, LWBS, SC, full leather
1998 Porsche 993 C4S: Zenith Blue, last aircooled widebody, Bilstein PSS10, Fister II + Fabspeed exhaust
2008 Audi B7 RS 4: Sprint Blue, Audi Exclusive Euro Bucket Interior, Premium+Titanium, many mods