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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 > 20" possibility



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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
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ASPECT RATIO
- WHEEL DIAMETER
ORIGINAL TIRES
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NEW TIRES
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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 %
                     
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      10-26-2006, 06:29 PM   #1
NSM
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20" possibility

I have come across some 20" Beyern Mess wheels brand new in box for a great price. THe problem is I'm not sure the backs are going to fit. I currently have a 330xi lowered with H&R Sports. The offset on the rear is +25ET. The wheel is 20x10. I'm thinking that it is just too aggressive of an offset to run the 20x10 set up. Any opinions or people with experience?
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      10-26-2006, 06:41 PM   #2
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Where are you getting them from?
I like those wheels too.
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      10-26-2006, 06:50 PM   #3
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I think you are right, that that is too aggressive, since you are lowered on H&R. If it was narrower, OR less aggressive offset, you might be ok, but the combination of these two WILL make you rub. =( The positive side says, "maybe rolling the fenders will correct it?"

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      10-26-2006, 06:54 PM   #4
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So, the higher the offset the more agressive? What is the perfect offset front and rear for a 330i? Regarding this wheels in particular?
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      10-26-2006, 06:56 PM   #5
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y not just stick with 19s?
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      10-26-2006, 07:04 PM   #6
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Quote:
Originally Posted by MonacoBimm
So, the higher the offset the more agressive?
No. Example: A offset of 25 is more aggressive then a 35 offset.
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      10-26-2006, 08:01 PM   #7
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Nic, I believe that 20x10 +25 on an H&R sport drop without rolling the fenders might rub on huge dips since the diameter is bigger and will be close to the fender lip, also, you it will depend on the tire size that you will choose. GL!
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      10-26-2006, 08:03 PM   #8
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Where are you getting them from?
I like those wheels too.
Private seller.

Ideal offset for 330 is around +28-+30 rear and +35 front. Front may be off someone can correct me.
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      10-26-2006, 08:07 PM   #9
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This really stinks.. maybe I'll just put my stock springs back in for the 20's. Any thoughts? The deal is really too good to pass up.
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      10-26-2006, 08:44 PM   #10
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+35 on the fronts with 20x?? if its 8-8.5inch, you'll be fine. considering youll throw a 225/30/20 tires on the front to prevent rubbing on the liner when you hit a dip.
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      10-26-2006, 09:30 PM   #11
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I just put 19x8.5 and 19x9.5 on mine, with 245/35 and 275/35 (I know, not ideal tires, but they were cheaper!)

They are 38 and 40 offsets. I'm on factory sport springs. HOLY CRAP. it looks SOOOO good. I'm in heaven. I'll post some pics in a couple days, but DAMN fine. offset in the FRONT could use just a FEW millimeters, like maybe a 10mm spacer, or basically a 28mm offset. the rears sit REALLY NICE, and look very aggressive, but I suppose you could put up to a 15mm spacer in without rubbing. I think they look AWESOME as is, though.

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      10-27-2006, 03:00 AM   #12
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Quote:
Originally Posted by ///Matt
I just put 19x8.5 and 19x9.5 on mine, with 245/35 and 275/35 (I know, not ideal tires, but they were cheaper!)
Wow, those are big rears! If my calculations are correct they are 39mm taller than stock and 123mm longer circumference. Good thing the speedometer uses the front wheels.

Looking forward to the pics.
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      10-27-2006, 04:49 AM   #13
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most likely your gonna rub with +25 in the rear. unless u go with 265 which will make your tires very look streached on 20x10
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