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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 > Question about wheel



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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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      11-09-2012, 02:27 PM   #1
bgill76
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Drives: 2008 328xi
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Question about wheel

I had a pinhole in my sidewall of one of my tires so I had to get it replaced. The store said they broke the tire sensor off and had to replace it later but I noticed a part inside of the wheel was missing and I'm wondering what it is.



It's like the little plastic looking piece. Tanish color. Some on the other wheels say different things such as Zn (zinc?).

Just wondering what it is.

And this isn't my wheel, just a image I found on google. There are a couple of these on each wheel I think
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      11-09-2012, 03:41 PM   #2
Tom K.
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Hard to tell from the pic, but it looks like a balancing weight. If your tire/wheel combination is in balance, no worries. If not, you should feel a vibration and/or steering wheel shimmy around 60~75 mph.

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