Alloy rims technical question

[Roundel]

Hi fellow's,
Right now I have Style 27 OEM wheels with 7JX15 ET:47 and DIA 72.6 which is recommended by BMW AG.

For summer I'm going to buy some 16" inch wheels and I have great offer:
Styling 154 double spoke from the E90 - OEM part number: 36 11 6 765 762.
1.
My question and a little problem is:
Is it too bad to use ET 34 instead of ET47. Some gurus in my country told me that +/-7 ET is possible OK from the OEM source. On practice +/- 12 is also OK.
What can be dangerous? Please, explain me advantages and disadvantages of doing this?

2.
As you know, one of the required parameters for fitting the wheels is DIA. For my 27-style and in general for E36 we have 72.6 DIA and the only +/- 0.1 is possible. May be some of you have TIS installed and can help me to find DIA for 36 11 6 765 762 - Style 154?

I really appreciate the help from the TI worldwide.

Thanks and Best Regards.

P.S.
For some of you it may be interesting. IMHO it's goog wheels for my loving TI.

[316i compact]

I dont know what is that DIA, what i know is that the ET34 is possible for sure. Most guys in here in here with aftermarket wheels run ET35.

[Roundel]

Sorry, I've forgotten to attach the common alloy rims tech spec.
Here you can find the DIA parameter.

BTW: Please post your POV to this style of wheels. It's interesting for me

[316i compact]

The DIA has nothing to do. All the wheels made for BMW,PDC 5*120, have the same wheel hub diameter, cause 5*120 is only used by BMWs. So dont even think about that.

[cooljess76]

Originally Posted by 316i compact

The DIA has nothing to do. All the wheels made for BMW,PDC 5*120, have the same wheel hub diameter, cause 5*120 is only used by BMWs. So dont even think about that.

ABSOLUTELY WRONG!!! I don't know where you got this info from, but you shouldn't post stuff like this unless you know for certain or from personal experience. All BMW wheels are not 5x120, earlier models had 4 lug. And as far as the DIA, it has everything to do with fitment. E39 BMW's have a hubcentric DIA of 74mm, while E36's have a hubcentric DIA of 72.56 thus, the centerbore on E39 wheels is too large to use on the E36 without using hubcentric reducer rings. While the bolt pattern might be the same for both vehicles, The centerbores are different. I just installed a set of 17x8" et20 DIA74 Style 42's from a 2003 BMW 5 Series on my 318ti and I'll tell you from experience that it can be done, but you will need hubcentric reducer rings and slight fender rolling. I also recommend using slightly narrower tires than normal. I'm running 215/40/17's.

74 > 72.56 hubcentric adapter rings(fit inside of the centerbore of the wheel):

Without these, you'll have serious vibration issues!

et20 Style 42's on my 318ti:

[316i compact]

I didnt explain what i meant ... The guy said about the offset and dia.. i saw that the offset he wanted to run is definetelaly from a 3 series/Z3/Z4, which are all the same. I knew that older BMWs had 4 luggs , but i dont think that the guy is so stupid to buy 14 inch four lug wheels for his car........... I know as well that the wheels from 5 series have too much offset, but he made a certain question. The wheels he pictured are taken off a E87 1 series or E90 3 series, so yes , they match with his car and i gave a quick answer in my previous post. The thing i didnt knew is about the E39 DIA. Did you roll your fenders to fit ET20s?

[cooljess76]

Only my rear fenders needed to be rolled because they barely rubbed. I just used a block of wood and a hammer to roll them in the areas needed. My car is lowered about 2.5 inches. I appologize if my reply was offensive, just didn't want him to get the wrong size. There's a lot of misleading information out there. So many people said that you couldn't fit et20 wheels on the 3 series and they were wrong. In fact, it wouldn't even be neccesary to roll the fenders if the car was at stock height. The only issue is centerbore diameter and that was fixed with a set of $12 adapter rings. BTW 5x120 is the same as 5x4.72 which is used on many other makes.

[316i compact]

Originally Posted by cooljess76

Only my rear fenders needed to be rolled because they barely rubbed. I just used a block of wood and a hammer to roll them in the areas needed. My car is lowered about 2.5 inches. I appologize if my reply was offensive, just didn't want him to get the wrong size. There's a lot of misleading information out there. So many people said that you couldn't fit et20 wheels on the 3 series and they were wrong. In fact, it wouldn't even be neccesary to roll the fenders if the car was at stock height. The only issue is centerbore diameter and that was fixed with a set of $12 adapter rings. BTW 5x120 is the same as 5x4.72 which is used on many other makes.

No prob m8. It was good you corrected me. I can't understand why my tires touch the fender. I am running 225-45-17 with 8*17 ET35 and when i have four people in the car and hit a bump, even slowly, i hear the tyre scratching on the fender at the rear. Why would this happen?
My car is lowered 1.3 inches at the rear. While rolling the arches , did you had any problems with the paint?

[cooljess76]

I almost never carry passengers in my car, I'm sure if I loaded it down it would rub pretty badly still. I'm a pretty big guy, 5'11" 240lbs, I generally date petite women so there's no problem there. My back seat remains empty. As for the paint, it was already chipping from a couple small rust spots that will soon be repaired, so I wasn't too concerned about damaging it. I think if you're careful, you probably could do it without using a heat gun. I'd still recommend the heat gun though, just to be safe.

[316i compact]

Can you send photos from the side, front and rear fenders, to check out how the ET20s fill the fender? Are they 8.5*18?

[cooljess76]

Originally Posted by 316i compact

Can you send photos from the side, front and rear fenders, to check out how the ET20s fill the fender? Are they 8.5*18?

I PM'd a few pics to you. It's raining right now so I'll take a few close ups tomorrow. They're 17x8's

[Roundel]

Hi Guys,
First, great thanks for the answers. I have 10 hours difference with California and probably I've missed your interesting conversation during the night.

Nevertheless,
2316i compact - I've understood your position and it seems to be OK. You are right, All the wheels from E36 - E46 have the ET like 47 (or 42-47) and so is 100% suitable for the TI. But the wheels I'm going to use are from the E90 323i 2005 and they have basic ET like ET34 for almost all styles of wheels.
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2cooljess76
1. This style 154 has the PDC 5*120 - that's OEM information. But I have no access to TIS right now to check the DIA and maybe you can help me with that - OEM part of style 154 wheels is 36 11 6 765 762. In case of DIA 72.56 for this wheels as I understand I don't need any hubcentric adapter rings? I'm correct?

2. You've recommended to use slightly narrower tires than normal. The normal size of 15" is 205/60R15 and for 16" 225/50 ZR16. E90 has basic size of 205/55 R16 and so the wheels I'm interesting have the Continental summer tires of 205/55 R16 that is slightly narrower that the E36 R16 basic tire size. Is it OK, what do you think?
3. You told that "My car is lowered about 2.5 inches". Do you think that changing the wheels mentioned above can cause my car to lower for some inches?

In any case great thanks for the competent opinions and advices.

[316i compact]

Υοur car is not going to lower if you put the correct tire size. It's not needed to put 225-50-16, 205-55-16 will also work fine. My previous wheels were 7*15ET30 with 205-60-15 and i never had any problem, you are not going to have as well i guess. The tires you have from the E90 are runflat, and runflat are not the best you can use, maybe you should swap to normal tires.

[Roundel]

Man, the wheels I'm going to buy are equiped with Continental PremiumContact SSR 205/55 R16 91V and could you please explain me what is the "runflat" tires?

[316i compact]

http://www.bridgestone.com.au/tyres/...lat/behind.asp