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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 > Offsets



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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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      09-11-2013, 02:00 PM   #1
DaRealist 2
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Offsets

Hey this is my first post and i need help on offsets. I have an 08 335i coupe with 19" style 230 rims after doing some research i heard that these rims tend to crack since then i have cracked 2 rims. I was looking to replace them when i decided that i dont want the reoccurring problem. I look to replace them with some replica m6 wheels. I found some that 19 x 9.5 front and back with an 30 offset. I also found some 19 x 8.5 (front) 19 x 9.5 (rear) but not sure of the offset. I have a staggered set on now and was wondering which is the better route and also will they fit? Im trying to keep it as close to stock as possible for i am not an aggressive driver until the weekends. Also any suggestions on tires want to get away from run flats.
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      09-11-2013, 03:11 PM   #2
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Well the style 230 wheels technically a stronger rim then the replica M6 wheels you are looking at. Whether you get forged, cast, or any wheels like that you have a chance to crack a wheel. I would suggest going with the recommend offsets if you want to keep your wheels as close to stock at possible. The stock 230 wheels are 19x8(+37)/9(+39) so that 9.5(+30) in the front will be really aggressive and would require stretched tires up front. Depending on the offset the other set of wheels you found might be your better bet.
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Last edited by ACEE; 09-11-2013 at 03:17 PM.
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      09-12-2013, 08:51 AM   #3
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Hey thanks for the help would you have any suggestion for 20" inch rims as well? The other set i was looking at had 35 offsets front and back how so im assuming thats a better fit?

Last edited by DaRealist 2; 09-12-2013 at 08:54 AM. Reason: more questions
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      09-12-2013, 01:11 PM   #4
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If you're experiencing wheel cracks, I would advise against going with 20" wheels. You'll have an even lower profile tire, which makes the wheel more susceptible to damage from road hazards.
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      09-13-2013, 10:22 AM   #5
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Quote:
Originally Posted by VMRWheels View Post
If you're experiencing wheel cracks, I would advise against going with 20" wheels. You'll have an even lower profile tire, which makes the wheel more susceptible to damage from road hazards.
I would def say this ^^^^^

Even though I have 20s I still used 19" tire sizes (225/35/20 and 255/30/20) THESE ARE NOT RECOMMENDED tire sizes for 20s. I went this route b/c i wanted more meat on my tires.
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      09-16-2013, 07:43 AM   #6
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Quote:
Originally Posted by VMRWheels View Post
If you're experiencing wheel cracks, I would advise against going with 20" wheels. You'll have an even lower profile tire, which makes the wheel more susceptible to damage from road hazards.
+1
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