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Old 05-20-2010, 12:58 AM   #8 (permalink)
Nikon FM
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Join Date: Jan 2009
Location: Snoqualmie WA
Posts: 973
Drives: 03 996TT Porsche
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Quote:
Originally Posted by ChrisSlicks View Post
SRM is unaffected by any gearing change past the output shaft of the gearbox. You can change rear-end gears or tire diameters and it will still work.

VDC is affected by tire diameter change if the front and rear diameters (and hence revolution speed) are dissimilar by more than a certain margin.
Comparing front to rear diameter ratios OEM=1.01 (Bridgestone 245/40 275/35)

I changed to 1.00 for daily driving. (Hankook V12 255/35 295/30)

My track set is .98 but still good. (Toyo R888 265/30 295/30)

No SRM or VDC issues.
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