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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 > New wheels for my E92?? sizes??



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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 %
                     
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      06-18-2010, 05:40 AM   #1
tjcee
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New wheels for my E92?? sizes??

Hello, I have a quick question for someone knowledgeable in the topic. I have a 2007 328 and I am interested in upgrading my wheels/tires. I just need to know what size is the largest I can go. I'm not looking to go huge, but if I know the maximum size, I know not to go too big.

For instance can I put some 18x8 and 18x8.5's on the stock car without any problems? Do I need spacers? I see a lot of talk of spacers. Would I need them and if so, what size?

Thanks for your time! I appreciate the input.

TJ
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      06-18-2010, 11:40 AM   #2
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Do I need spacers?
i'll answer part of your question

depends on spoke design and offset of the wheel.

these sites are helpful.

http://www.1010tires.com/wheeloffsetcalculator.asp

http://www.willtheyfit.com/
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      06-18-2010, 01:20 PM   #3
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Thanks for the reply and links. I guess it's not just cut and dry. I guess I will need to do some more research. Off I go
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      06-18-2010, 03:07 PM   #4
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You can go up to 20" on these cars but most popular sizing is in the 18"-19" range. Typical sizing is an 18x8.5 ET35-40 and 18x9.5 ET30-35 front and rear.
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      06-18-2010, 03:12 PM   #5
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Thanks Nick. Those are the numbers I was seeing. 18x8 and 18x8.5 is what I was thinking about. Are most a "standard" offset?? If not, do I need to know the offset to make sure they don't rub?

Thanks again.

TJ
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      06-18-2010, 04:45 PM   #6
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TJ the standard size that is recommended for an 18" setup is the 18x8.5 in the front and 18x9.5 in the rear which is the most common size that are manufactured. The offsets will differ depending on wheel brand but you should aim from anywhere from 18x8.5 ET35-40 in the front and 18x9.5 ET30-35 in the rear for your 2007 328.

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      06-18-2010, 05:53 PM   #7
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Thanks Alan.

Exactly the info I was looking for! Much appreciated.

TJ
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