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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 > General wheel question...



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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
/
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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      02-10-2006, 02:31 PM   #1
silver
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General wheel question...

hi, we have e90 325 and my father is happy with type 161's...

I have a general wheel question... standart and optional wheel specs are;

6.5*16 et 37 205 55 16
7*17 et 39 215 45 17
7.5*18 et 37 225 45 18

I want to have 19's... how can I understnd if a wheel is suitable or not??? what are the suitable dimensions???

I want to buy a wheel 7*19 et 35 and use with 215/35/19
and use with eibach 50/35.. but I do not know if they suit well or it needs body working???

any suggestions? thanks
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      02-10-2006, 03:24 PM   #2
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Answer: yes that wheel and tire should fit fine.

Question: why downgrade to a 7" wide 19" wheel when a 8.5 will fit?

Question 2: are you looking just for looks from the wheel upgrade?
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      02-10-2006, 03:31 PM   #3
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why are you going with such a thin width size tries? you can go 245 but 235 should be normal. the stock width tire is 225?
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      02-10-2006, 04:08 PM   #4
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Quote:
Originally Posted by dkizerian
Answer: yes that wheel and tire should fit fine.

Question: why downgrade to a 7" wide 19" wheel when a 8.5 will fit?

Question 2: are you looking just for looks from the wheel upgrade?
1. problem is that original wheel is 4*100;
I can not find 19'' with 4*100; only 7'' or 7.5'' wide...
(and I really liked the wheel that is 7*19 et 35)

2. yes and I do not want to have problems about rubbing the wheel and the body of the car

thanks
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      02-10-2006, 04:11 PM   #5
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Quote:
Originally Posted by longtran
why are you going with such a thin width size tries? you can go 245 but 235 should be normal. the stock width tire is 225?
as I explanied before; 4*100 stock is 205 55 16

I do not want to use more than 225, I want 215 because the car will lower by 50/35; and if the diameter of the tire increases I can have problems...

thanks
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      02-10-2006, 04:18 PM   #6
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Quote:
Originally Posted by silver
as I explanied before; 4*100

I do not want to use more than 225, I want 215 because the car will lower by 50/35; and if the diameter of the tire increases I can have problems...

thanks
Silver, do you know how to use the wheel/tire calculator on top of this page? It will tell you what differences to expect with whatever numbers you plug in, compared to stock. You will see that among other things, going with 215 makes no sense, and by doing so, your taking the car a step down in performance.

Danny
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      02-10-2006, 04:19 PM   #7
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i have no idea what you are asking?? what is 4*100? nevermind.
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      02-10-2006, 04:27 PM   #8
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Quote:
Originally Posted by HRC
Silver, do you know how to use the wheel/tire calculator on top of this page? It will tell you what differences to expect with whatever numbers you plug in, compared to stock. You will see that among other things, going with 215 makes no sense, and by doing so, your taking the car a step down in performance.

Danny
yes I know how to use the calculator but not too much...
and I do not think that this calculator is efficient...
I think only says the displacement of the wheel on the horizontal axis, based on offset (et) calculation... but if we lower the car, the limit spaces can change from car to car..
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      02-10-2006, 04:27 PM   #9
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Quote:
Originally Posted by longtran
i have no idea what you are asking?? what is 4*100? nevermind.

4*100 is the PCD (Pitch Circle Diameter) of the wheel
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      02-10-2006, 04:29 PM   #10
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Quote:
Originally Posted by silver
yes I know how to use the calculator but not too much...
and I do not think that this calculator is efficient...
I think only says the displacement of the wheel on the horizontal axis, based on offset (et) calculation... but if we lower the car, the limit spaces can change from car to car..
Alright, just trying to help, good luck!

Danny
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      02-10-2006, 04:53 PM   #11
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Quote:
Originally Posted by silver
4*100 is the PCD (Pitch Circle Diameter) of the wheel
You have a 4x100 wheel on your 325? I thought all e90's were 5x120......
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