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      06-07-2013, 02:31 AM   #1
se7en_z3r0
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2012 328i Need help w/ wheel sizes

I just bought the car CPO with 16k and it has stock 17s with a lot of rubber. I have read some people say that 19x9.5 front / 19x10 rear is too wide and others say no problem. I called concept one and they said the 20s would fit my sedan. How do you really figure it out? Any help would be appreciated!

I understand the concept of offsets but I still do t know how to calculate how much room I will have.

Thx
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      06-07-2013, 11:09 AM   #2
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I am looking at the VarrsToen ES222 right now but it's only available in 19x9.5+20 / 19x10.5+22. Aggressive offsets. I have seen them on BMWs, but what would be needed to get a good fitment? Spacers? Rolled fenders?

I really need some advice. Thx

Edit: just found this calculator posted in another thread - awesome
http://www.rimsntires.com/specs.jsp
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      06-07-2013, 02:01 PM   #3
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That's definitely not going to fit. Read my thread about OEM M3 wheels. That's about the max you can fit
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      06-07-2013, 09:43 PM   #4
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So you are saying 8.5 ET29 is the widest for an F30? I am guessing that the aggressive offset is the problem, right? Sorry this is all new to me. I'm a total idiot right now ; )

Do you prefer a staggered or square? Im leaning towards square right now because I am reading that it handles better and reduces some understeer.
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      06-08-2013, 03:19 AM   #5
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It's a combination of width and offset. For example. An 8.5 ET 29 compared to stock 8 ET 34 is 5mm + 1/4 inch (from the width) which is about 6mm. So total, the new front is 11mm farther out than stock. In the rear, 8.5ET29 vs 8.5ET47 is 18mm sticking out.

So in your case, 9.5 ET 20 is like half an inch + 9mm which is like 21mm on top of mine which is 11mm already so you're at 32mm over stock. The problem is that front is already pretty flush, so 32 mm is waay too much
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      06-08-2013, 03:27 AM   #6
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Thats a lot of math ; ) I also noticed on concept one's images the back wheels are negative cambered to make it fit. Not what i'm looking for. I just found the Avante Garde M550 and they have much better offsets, I think... 19x8.5 ET35.

thx for your help!
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      06-08-2013, 01:42 PM   #7
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Hah, that'll fit fine
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      06-08-2013, 02:09 PM   #8
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The calculators says 9.5 should fit also I think they are 33ET but you said the front is pretty flush already. What would you do momo?

Package is 6 mm (0.2'') closer to suspension/brakes components. Acceptable for most cars.
Package will stick out 14 mm (0.6'') farther. Acceptable for most cars.
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      06-08-2013, 02:12 PM   #9
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From what you are saying staggered would fill out the wheel well better being flush on the fenders. If I go square 8.5s I guess I might need a spacer on the back.
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