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Old 08-26-2012, 06:59 PM   #22
D1cker
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Join Date: Jul 2012
Drives: B9 S4/ND2
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Quote:
Originally Posted by Spartan65 View Post
I will be looking for a 18x7.5 with a 42-45 mm offset

OEM
17x7 5-100 48mm offset with 215/45-17 tires
Sidewall 3.8 in
Radius 12.3 n
Diameter 24.6 in
Circumference 77.3 in
RPM 819.0

Option 1
18x7.5 42-45mm offset wheel with 235/35-18 tires
Sidewall 3.2 in
Radius 12.2 n
Diameter 24.5 in
Circumference 76.9 in
RPM 824.0

Option 2 = Expensive as all Hell
19x7.5 5-100 42mm offset 235/30-19 tires
Sidewall 2.8 in
Radius 12.3 in
Diameter 24.6 in
Circumference 77.1 in
RPM 821.0

I learned over the years that if you keep the RPM close and the weight down you only lose by the drag created from the width, any deviation from this has direct effect upon gearing and power bleed.
The problem with this is that almost no one makes a 235/35/18. 245/35/18 will be a lot more readily available or 225/40/18
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