Tirerack
Use the following links to go directly to useful tirerack winter items: Tirerack Winter Tires. Gary's Winter Tire FAQ.
Using the links directly supports E90Post with tirerack sales commision!

  E90Post
 


TireRack

   PLEASE HELP SUPPORT E90POST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > 18x8 ET 20 square setup on 328xi - what tire size?



Wheels and Tires forum Sponsored by The Tire Rack
Please help to directly support e90post by doing your tirerack shopping from the above link. For every sale made through the link, e90post gets sponsor support to keep the site alive. Disclaimer

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
Collapse/Expand the BimmerPost Wheel and Tire calculator
Reply
 
Thread Tools Search this Thread
      07-22-2012, 06:34 PM   #1
Powashiftin
Private First Class
 
Drives: bmw
Join Date: Apr 2010
Location: NJ

Posts: 135
iTrader: (0)

18x8 ET 20 square setup on 328xi - what tire size?

I'm thinking 225/40/18?
Powashiftin is offline  
0
Reply With Quote
      07-22-2012, 07:39 PM   #2
wdeerfield
A family of bimmers
 
Drives: 2009 e90 2011 f10
Join Date: Jan 2012
Location: Clifton Park, NY

Posts: 2,953
iTrader: (0)

thatll work
__________________

2009 MBM 328| ZPP | ZSP | ZCW | CA | 6FL | NAV | XENONS | 18x8.5 VB3s ET30/25
2011 Jet Black 535i xdrive | ZPP | ZSP | ZCW | 6FL | NAV | 331s Square
wdeerfield is offline   United_States
0
Reply With Quote
      07-23-2012, 03:00 PM   #3
VMRWheels
BimmerPost Supporting Vendor

 
VMRWheels's Avatar
 
Drives: BMW
Join Date: Jun 2007
Location: Anaheim, CA

Posts: 12,545
iTrader: (4)

Garage List
2008 5 Series  [3.30]
Yup, I wouldn't recommend any other size on that wheel. 225/40's will work, both run-flats and non run-flats. But ET20 sounds aggressive depending on what car it's going on - E90, E92, E90-LCI?
__________________
VMRWheels is offline  
0
Reply With Quote
      07-23-2012, 04:43 PM   #4
wdeerfield
A family of bimmers
 
Drives: 2009 e90 2011 f10
Join Date: Jan 2012
Location: Clifton Park, NY

Posts: 2,953
iTrader: (0)

pushing the wheel out 14mm from stock shouldnt be too aggressive if stock sports suspension. im on 8.5 et 30 up front and could have gone to et25-28 just fine.
__________________

2009 MBM 328| ZPP | ZSP | ZCW | CA | 6FL | NAV | XENONS | 18x8.5 VB3s ET30/25
2011 Jet Black 535i xdrive | ZPP | ZSP | ZCW | 6FL | NAV | 331s Square
wdeerfield is offline   United_States
0
Reply With Quote
      07-24-2012, 06:29 PM   #5
Powashiftin
Private First Class
 
Drives: bmw
Join Date: Apr 2010
Location: NJ

Posts: 135
iTrader: (0)

Quote:
Originally Posted by VMRWheels View Post
Yup, I wouldn't recommend any other size on that wheel. 225/40's will work, both run-flats and non run-flats. But ET20 sounds aggressive depending on what car it's going on - E90, E92, E90-LCI?
2008 E90 328xi non sport
Powashiftin is offline  
0
Reply With Quote
      08-01-2012, 06:45 PM   #6
Powashiftin
Private First Class
 
Drives: bmw
Join Date: Apr 2010
Location: NJ

Posts: 135
iTrader: (0)

Guys, about to order 225/40/18 for 18x8 et20 wheels on an e90xi non sport. Am I good?
Powashiftin is offline  
0
Reply With Quote
      08-01-2012, 08:03 PM   #7
wdeerfield
A family of bimmers
 
Drives: 2009 e90 2011 f10
Join Date: Jan 2012
Location: Clifton Park, NY

Posts: 2,953
iTrader: (0)

yup. which tires though. some are more square than others.
__________________

2009 MBM 328| ZPP | ZSP | ZCW | CA | 6FL | NAV | XENONS | 18x8.5 VB3s ET30/25
2011 Jet Black 535i xdrive | ZPP | ZSP | ZCW | 6FL | NAV | 331s Square
wdeerfield is offline   United_States
0
Reply With Quote
      08-01-2012, 08:19 PM   #8
Powashiftin
Private First Class
 
Drives: bmw
Join Date: Apr 2010
Location: NJ

Posts: 135
iTrader: (0)

Quote:
Originally Posted by wdeerfield View Post
yup. which tires though. some are more square than others.
Kumho LX
Powashiftin is offline  
0
Reply With Quote
      08-02-2012, 08:12 AM   #9
wdeerfield
A family of bimmers
 
Drives: 2009 e90 2011 f10
Join Date: Jan 2012
Location: Clifton Park, NY

Posts: 2,953
iTrader: (0)

those seem to be a pretty square shoulder. Since you are not dropped it should be fine. Search on here for people with the same offsets to see how it looks
__________________

2009 MBM 328| ZPP | ZSP | ZCW | CA | 6FL | NAV | XENONS | 18x8.5 VB3s ET30/25
2011 Jet Black 535i xdrive | ZPP | ZSP | ZCW | 6FL | NAV | 331s Square
wdeerfield is offline   United_States
0
Reply With Quote
      08-02-2012, 01:33 PM   #10
VMRWheels
BimmerPost Supporting Vendor

 
VMRWheels's Avatar
 
Drives: BMW
Join Date: Jun 2007
Location: Anaheim, CA

Posts: 12,545
iTrader: (4)

Garage List
2008 5 Series  [3.30]
Quote:
Originally Posted by wdeerfield View Post
pushing the wheel out 14mm from stock shouldnt be too aggressive if stock sports suspension. im on 8.5 et 30 up front and could have gone to et25-28 just fine.
You're right. It'll be pretty flush though. Like deerfield said as well, it depends on the tires, different tires have different sidewalls and the difference between rubbing and not rubbing is only 1-2mm.
__________________
VMRWheels is offline  
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 09:02 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST