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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 > Tires...



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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      08-03-2012, 09:11 AM   #23
williewonkerz
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are they run flats? Then yes replace them......
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      08-03-2012, 10:52 AM   #24
Tom K.
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Quote:
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are they run flats? Then yes replace them......

Good advice - so if they are go-flats, then run them until the cords are showing!

Tom
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      08-03-2012, 12:10 PM   #25
328ixdrive66
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Well, first off that is crazy 20K? wow during normal driving you should change your tires every 3-4K AT MOST be very carful with that many miles on your car!
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      08-03-2012, 12:25 PM   #26
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Good advice - so if they are go-flats, then run them until the cords are showing!

Tom
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      08-03-2012, 12:53 PM   #27
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I still have 4/32 remaining and the dealer told me when I bought the car that I will have to replace the tires every year cause it's Run Flats
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      08-03-2012, 01:58 PM   #28
Tom K.
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I still have 4/32 remaining and the dealer told me when I bought the car that I will have to replace the tires every year cause it's Run Flats
And I'll bet the dealer told you you could only buy tires from them!

Tom
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      08-03-2012, 02:01 PM   #29
ouchie
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Nahh haha
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      08-03-2012, 03:09 PM   #30
3_runner
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Quote:
Originally Posted by 328ixdrive66
Well, first off that is crazy 20K? wow during normal driving you should change your tires every 3-4K AT MOST be very carful with that many miles on your car!
... Wha?
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      08-03-2012, 06:22 PM   #31
mob17
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3-4k limit must be a joke...
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      08-03-2012, 08:54 PM   #32
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Well, first off that is crazy 20K? wow during normal driving you should change your tires every 3-4K AT MOST be very carful with that many miles on your car!
i think you are confusing tires with an oil change
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      08-03-2012, 11:13 PM   #33
excalibur_335i
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what some others have to say...many factors play a role with runflat wear

http://www.e90post.com/forums/showthread.php?t=462527
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