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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 > need help with square set up



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      01-08-2012, 10:38 PM   #1
afshin
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need help with square set up

hi what do you guys recommend for 18" square set up in terms of offset, width and tires? i have a 328xi e90 pre lci, thanks
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      01-09-2012, 09:49 AM   #2
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18X8-18X8.5 is what most would use with tires of 225/40R18 or 235/40R18. Offsets vary quite a bit but are normally in the neighborhood of 30mm-40mm.

Wheels http://www.tirerack.com/a.jsp?a=AH8&...eels/index.jsp
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      01-09-2012, 01:23 PM   #3
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Related question for Gary: I want to run a set of the 17" kosei K4r's potentially in the 8.5" width as a square setup with a 255 width R-S3 or Dunlop Sar Spec tire. I know the rear will be fine, since it's close to stock. But the front looks like with an 8.5" at that offset (40) will have 12mm or so less space between the suspension and wheel than stock. Will that rub? Or would you recommend 245's or 235's all around? I want to go as wide as possible for the grip.
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Last edited by mattdesmond; 01-09-2012 at 01:28 PM.
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      01-09-2012, 02:16 PM   #4
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I've been running the square setup for over 6 months with no problem. My wheels are OEM 193M rear wheels, 18x8.5 37mm offset, and tires are Yokohama AD08 255/35/18.
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      01-09-2012, 03:37 PM   #5
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Quote:
Originally Posted by Gary@TireRack View Post
18X8-18X8.5 is what most would use with tires of 225/40R18 or 235/40R18. Offsets vary quite a bit but are normally in the neighborhood of 30mm-40mm.

Wheels http://www.tirerack.com/a.jsp?a=AH8&...eels/index.jsp
+1

We recommend an 18x8.5 ET35-ET40 with a 225-235 tire.
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      01-10-2012, 11:32 AM   #6
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Quote:
Originally Posted by mattdesmond View Post
Related question for Gary: I want to run a set of the 17" kosei K4r's potentially in the 8.5" width as a square setup with a 255 width R-S3 or Dunlop Sar Spec tire. I know the rear will be fine, since it's close to stock. But the front looks like with an 8.5" at that offset (40) will have 12mm or so less space between the suspension and wheel than stock. Will that rub? Or would you recommend 245's or 235's all around? I want to go as wide as possible for the grip.
235/45R17 with that setup are the most aggressive I can recommend up front without rubbing.
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      01-10-2012, 02:29 PM   #7
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The above info is correct!
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      01-10-2012, 06:38 PM   #8
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OK, thanks!
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      01-10-2012, 06:45 PM   #9
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Quote:
Originally Posted by Gary@TireRack View Post
18X8-18X8.5 is what most would use with tires of 225/40R18 or 235/40R18. Offsets vary quite a bit but are normally in the neighborhood of 30mm-40mm.

Wheels http://www.tirerack.com/a.jsp?a=AH8&...eels/index.jsp

I am getting conflicting information from the TireRack site. When I enter 2007 328xi with 18" staggered, the tire size recommended are

Front Optional 18" 225/40-18
Rear Optional 18" 255/35-18

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      01-11-2012, 10:48 AM   #10
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Quote:
Originally Posted by LetsRock View Post
I am getting conflicting information from the TireRack site. When I enter 2007 328xi with 18" staggered, the tire size recommended are

Front Optional 18" 225/40-18
Rear Optional 18" 255/35-18

The OP asked about a square setup, meaning the same size front and rear.
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