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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 > 320i upgrade wheels 16" to 18" issues



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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.
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         New Wheel Width  inches                  New Wheel Offset  mm.
 
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      08-01-2010, 11:24 PM   #1
jmax1978
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320i upgrade wheels 16" to 18" issues

Need help , i have a 2006 E90 320i europe with wheels from factory :

double spoke style 156 size 16 x 7 with RFT BT Turanza 205/55 ET34
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a friend of mine is selling me a style 128 not oem , a set of 4:

spider spoke style 128 (replica see picture) size 18" x 8.5 j 225/40 R18
he has those in a 328i.

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i read some people say they recommends rims for E90 in 18" size is:
front 8 x 18" 225/40 r18
rear 8.5 x 18" 255/35 r18

http://www.kalach.easynet.be/style/style_189.htm

Issues:

1. can use 8.5 X 18" size in front ?
2. do i need put any spacer in any of the rears to adapt them?
3. can i use RFT tires for Rims 18"?
4. will have issues with my engine (2.0) or direction/suspention problems for the wide of the wheels?
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      08-02-2010, 12:34 AM   #2
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also , should i lowering the vehicle?
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      08-02-2010, 03:07 AM   #3
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I wonder if you have somehow got the wheel sizes mixed up. I never heard of any BMW being supplied from the factory with a set of four 18x8.5" non-staggered wheels as you wrote. One possibillity is the staggered sizes you wrote as being recommended above. Otherwise for non-staggered size, it would be more likley they are 18x8.0 rims with 225/40/18 tires.
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      08-02-2010, 06:20 AM   #4
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Quote:
Originally Posted by John_01 View Post
I wonder if you have somehow got the wheel sizes mixed up. I never heard of any BMW being supplied from the factory with a set of four 18x8.5" non-staggered wheels as you wrote. One possibillity is the staggered sizes you wrote as being recommended above. Otherwise for non-staggered size, it would be more likley they are 18x8.0 rims with 225/40/18 tires.
The 18x8.5 are reps.
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      08-02-2010, 06:22 AM   #5
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Quote:
Originally Posted by jmax1978 View Post
Need help , i have a 2006 E90 320i europe with wheels from factory :

a friend of mine is selling me a style 128 not oem , a set of 4:

spider spoke style 128 (replica see picture) size 18" x 8.5 j 225/40 R18
he has those in a 328i.
If the fit on a 328i they'll fit on your 320i too.
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      08-02-2010, 06:26 AM   #6
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Depends entirely on offset. If you're saying they are replicas then that could be anything. If they already fit a 328i then I guess its promising. For OEM it seems they do make this wheel in 8.5j, but it looks like its for an X3 or E60.
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      08-02-2010, 12:45 PM   #7
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Quote:
Originally Posted by remmib View Post
If the fit on a 328i they'll fit on your 320i too.
Ditto.

1. can use 8.5 X 18" size in front ?
18x8.5" fronts are not a problem with the proper offsets.
2. do i need put any spacer in any of the rears to adapt them?
Depending on what the rear offset is, you may not need any kind of spacers.
3. can i use RFT tires for Rims 18"?
Yes you can.
4. will have issues with my engine (2.0) or direction/suspention problems for the wide of the wheels?
These sizes should not pose any kind of problems to the vehicle since they are all within 3% of the OE sizes.

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      08-02-2010, 01:12 PM   #8
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Thanks Charles !! i think i will try them ...
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