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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > help out a wheel n00b please



Wheels and Tires forum Sponsored by The Tire Rack
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Wheel offset calculator courtesy of BimmerPost.com. You may use this calculator to calculate what tire sizes you might need if you upgrade your tires, or what wheel sizes/offsets are compatible with your car.
    Current Wheel Width  inches             Current Wheel Offset  mm.
         New Wheel Width  inches                  New Wheel Offset  mm.
 
TIRE WIDTH
/
ASPECT RATIO
- WHEEL DIAMETER
ORIGINAL TIRES
/
NEW TIRES
/
Based on your stock wheel setup, your new wheel will have:
Original Tires Diameter (in.)
      New Tires Diameter (in.)
  Difference in diameter (in.)
           Percent Difference %
                     
Speedo @60mph will read: mph
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      01-22-2012, 09:17 AM   #1
mathematics
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help out a wheel n00b please

Car is 2008 328i e93. I currently have oem 17" wheels and want to go with 20" vossen vvs-cv3. i know a 20" fits, but i'm not sure of the optimal tire sizes for front and rear. i don't drive the car much and want these for aesthetic reasons. i will also be buying coil overs to get some comfort as well as to be able to adjust ride height. a friend of mine told me to go for Continental DWS tires if that helps you help me lol. any help is much appreciated. thanks guys.
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      01-22-2012, 11:24 AM   #2
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I'd get 245/30/20 and 285/25/20, if the offset is ET35 to 40ish.
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      01-22-2012, 11:55 AM   #3
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Quote:
Originally Posted by remmib View Post
I'd get 245/30/20 and 285/25/20, if the offset is ET35 to 40ish.
what is this offset you speak of? lol
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      01-22-2012, 01:13 PM   #4
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Quote:
Originally Posted by mathematics View Post
what is this offset you speak of? lol
Google 'wheel offset'.
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      01-22-2012, 01:56 PM   #5
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I'm just gonna say don't do it now. Your brakes are tiny, and 20" Vossens will make them look like compact discs.
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      01-22-2012, 02:04 PM   #6
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Quote:
Originally Posted by mathematics View Post
what is this offset you speak of? lol
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      01-22-2012, 11:06 PM   #7
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ok, got it. tried to download the wheel specifications to check the offset, but the page doesn't work =(
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