Do M4 wheels fit f12?

[dawg1]

Thinking of some new wheels I could get. I've read the M5 wheels (343) fit but do the M4 (437) wheels work also on a '14 640xi coupe?

They are, I believe:
Front 9JX19 ET:29
Rear 10JX19 ET:40

Thanks.

[PIR3lly]

Looks like front would be no problem, will stick out about 1cm more. Rear will stick out about 17mm more compared to stock 19" styling 351 wheels.

Check here:
https://www.wheel-size.com/calc/

And here:
http://felgenkatalog.auto-treff.com/

[ndinh]

Fitment will be fine. Fronts and rears will be close to being flushed with fender.

[Wlodi]

I tried them on on my f13.
My impression was that the rear fits in perfect but the front sticks out to much. I have 351 wheels right now and the front lines up with the fender. On 437M the front sticks out about 1cm more and it looks weird...

[upstate650]

Fit is a matter of opinion. Based on my experience, those will fit fine. I run the 343M M5 wheels and they are perfect, IMO.

[Wlodi]

Originally Posted by upstate650

Fit is a matter of opinion. Based on my experience, those will fit fine. I run the 343M M5 wheels and they are perfect, IMO.

Can You post a pic of how the fronts line up with the fender please?

According to this:
http://www.willtheyfit.com/index.php...h=9&offset2=29

the M4 fronts stick out 5mm more...

I am not sure whether to go for 437m or 343m wheels - as I said - for me it was a bit too much. Anybodys decision I guess...

[upstate650]

I still have winter wheels on right now (373M). With the M5 343's, there is room for 5mm more in front but rears are perfectly flush unless you lower it. I wouldn't go 1 mm more in rear.

[PIR3lly]

By filling in the wheel values from felgenkatalog.auto-treff.com in to the wheel calculator and reading the results on the bottom of the page. But like I said, compared to stock 19"

And I didn't look at the tire, only rim. Depending on tire size, that might stick out more or less than the rim itself.

The numbers you posted are wrong. You can't only look at et, but you also have to look at rim width. Compared to stock you go from 8,5J to 9J in the front and 9J to 10J in the back. That makes them stick out more than just the et difference.

[Wlodi]

Originally Posted by M6-Coupe

There is no problem at all. The front has 4 mm less (ET 33 vs ET 29) and the rear has the same (ET 44 vs ET40)... 4mm is nothing especially when people confirmed 343M is fit.

WRONG!



Its back to basics from what I see.
Lets take a look at how the 351m wheels look like on a 6 series :
Front:


As you can see there is not to much space for a wider setup. 5-6mm and that is all.

Back:


Here on the other hand we can see there is plenty of room.

1. The 351m are: 8,5 inch wide with ET 33 front / 9 inch wide ET 44 rear
2. The m5 343m (perfect fit) are: 9 inch wide with ET 34 front / 10 inch wide with ET 34 rear
3. The M4 437M are: 9 inch with ET 29 front / 10 inch with ET 40 rear

Now lets compare the fronts:
1 vs 2:
Compared to 351m wheel , the m5 343m wheel will have an inner rim which is 7.4mm closer to the suspension strut. The outer rim will poke out 5.4mm more than before.
GOOD!

http://www.willtheyfit.com/index.php...h=9&offset2=34

1 vs 3:
Compared to 351m wheel, the m4 437m wheel will have an inner rim which is 2.4mm closer to the suspension strut. The outer rim will poke out 10.4mm more than before.
NOT THAT GOOD

http://www.willtheyfit.com/index.php...h=9&offset2=29


As for the rears:
1 vs 2:
Compared to 351m wheel, ththe m5 343m wheel will have an inner rim which is 2.7mm closer to the suspension strut. The outer rim will poke out 22.7mm more than before.
GOOD!

http://www.willtheyfit.com/index.php...=10&offset2=34

1 vs 3:
Compared to 351m wheel, the m4 437m wheel will have an inner rim which is 8.7mm closer to the suspension strut. The outer rim will poke out 16.7mm more than before.
Also OK but less aggressive then the M5 wheels

http://www.willtheyfit.com/index.php...=10&offset2=40


But still - it is anybodys choice...

[upstate650]

Good post above. I would say that there is room for the m4 front on the six series. The M5 fronts aren't super aggressive. There is room for 5 mm more. But, if you are going that aggressive on the front, you will probably want the same degree of aggression on the rear, so you may want a spacer there.

[upstate650]

Originally Posted by M6-Coupe

Dude, you need to know a little more about ET before jumping to conclusion. ET is the distance from the inner edge to the sitting location and it does not have any relation to the width of rims. In fact the wider rim can have different ET to offset that distance. Furthermore the actual width of your wheel is based on tire and not rim because tires must be wider than rims. Having said that for example the 9" wide 343M has 228 mm width while the tire (265/35/20) is about 40 mm wider.
now lets back to the rims.
In fact as long as you are instilling 265 tire on 8.5" or 9" or even 9.5" rim with the same ET, the suspension side has the same clearance however for fender side it's different...

BTW your information about 343M is "wrong"
343M(M5): front 9x20 ET 32 , Rear 10x20 ET 34https://www.realoem.com/bmw/enUS/showparts?id=FV93-USA-07-2012-F10-BMW-M5&diagId=36_1643

I don't have time to look up the number right now, but ET is absolutely effected by wheel width - it relates to the center line of the wheel. Look at the offset calculator on 1010tire.com. I believe it has a in depth explanation.

Tire width can be an important consideration for inner clearances. Tires DO NOT have to be wider than the rim - take a look at the current stretched tire craze. Wider tires, on the other hand, can extend inward beyond the edge of the wheel, making clearances even smaller and increasing the chances of rubbing.

I will look up the numbers later - to the OP - plug your numbers into the offset calculator yourself - there is a lot of bad information here.

[ndinh]

Originally Posted by M6-Coupe

The ET is calculated based on the dimension of rim. For example 8.5" ET 34 has the same ET of 9" ET 34... It's the distance between "sitting location" of rim and the edge

Hmmm, I guess I've been wrong all these years. I always thought the offset is calculated using the centerpoint of the wheel so width would have a major impact on offset. For example, if I'm running 20x9 ET36 up front and want to put on 20x9.5, I'd have to lower that ET number (bring wheel out further) so the extra 0.5" width won't hit my struts, etc. on the inside. Thanks for the insight.

Stock 351's per wheel-size.com:
8.5Jx19 ET33 / 9Jx19 ET44

Inputting the numbers for the M4 setup above into willtheyfit.com gives:

Front (quote):
Compared to your existing wheel, this new wheel will have an inner rim which is 2.4mm closer to the suspension strut. The outer rim will poke out 10.4mm more than before.

Rear:
Compared to your existing wheel, this new wheel will have an inner rim which is 8.7mm closer to the suspension strut. The outer rim will poke out 16.7mm more than before.

From the data above, it looks like it'll be a pretty aggressive setup. Some people are cool with that and others not so much.

[upstate650]

Originally Posted by M6-Coupe

????
My F13 M6 had 343M rims. 9.5" (241 mm) front and 10.5" (267 mm) rear.
The front tire was 265 mm wide and the rear one was 295 mm wide...

My current M4 has 666M rims. 9" (229 mm ) front and 10" (254 mm) rear
The front tire is 265 mm wide and the rear one is 285 mm wide...
What do you mean "Tires DO NOT have to be wider than the rims" ?

have you ever seen a stretched tire? people are doing it all the time! But that really doesn't get to the heart of the issue here..

OK, it looks like people are acknowledging that some of the information offered her isn't accurate.

To the OP. I would suggest that you bookmark an offset calculator (I like the one on 1010tire.com) and learn the terms yourself. Rely on others for pictures of setups for a frame of reference, but don't rely on them to do your calculations for you. Looking at the M4 wheel numbers that have been posted, the inner clearance on the rear tires is a bit of a concern - I'm not sure how much room is there, but reducing the clearance by almost 9mm raises the potential for rubbing.

[upstate650]

Originally Posted by M6-Coupe

My point is that tires MUST be wider than wheels and that's the way we see wheels are coming from factory. So basically the maximum width of wheels are defined based on tires and not rims. Especially in this case that we are talking about factory rims and tires. For all of these rims tires are wider than rims

Maybe this link explains what I am trying to say

https://www.rimsntires.com/specspro.jsp

You can select the 245/40/19 tire (or 265/40/19) with two different rims (8.5" ET 33 and 9" ET 29) to see the difference
Any tire wider than 9" (228 mm) will show my point

for factory applications, I agree with you. For performance applications I agree with you. But for those more concerned with what is currently passing for "aesthetics", Stance Nation disagrees with you.

[Wlodi]

Originally Posted by M6-Coupe

Dude, you need to know a little more about ET before jumping to conclusion. ET is the distance from the inner edge to the sitting location and it does not have any relation to the width of rims. In fact the wider rim can have different ET to offset that distance. Furthermore the actual width of your wheel is based on tire and not rim because tires must be wider than rims. Having said that for example the 9" wide 343M has 228 mm width while the tire (265/35/20) is about 40 mm wider.
now lets back to the rims.
In fact as long as you are instilling 265 tire on 8.5" or 9" or even 9.5" rim with the same ET, the suspension side has the same clearance however for fender side it's different...

BTW your information about 343M is "wrong"
343M(M5): front 9x20 ET 32 , Rear 10x20 ET 34https://www.realoem.com/bmw/enUS/showparts?id=FV93-USA-07-2012-F10-BMW-M5&diagId=36_1643

You are right about the ET of the M5 wheels. There is a mistake on one of the websites I guess.

As for the other stuff - I think U R the one that needs to know a bit more about ET. You are the only one that says that ET has nothing to do with rim width.
Also as U already know the tyres dont have to be wider than rims. For the 9" and 10" rims the 245/275 tyres will work

This forum is for sharing knowledge. Also for its verifying .
Regards

[Wlodi]

LOL LOL LOL

I think U should keep your knowledge to youself more than me.

This is a thred about F12 non-M (the M discussion is elsewhere).
245/275 are the correct tyre sizes for non M F12 F13 F06. Anything other will cause differences in wheel size and for examples errors in speed display. That is why I didn't even consider putting on anything else then the oryginal size tyres. Apart from that - I do not think that our friend that wrote the first post was considering buying a new set ot tyres.

I gave an example with pics on how it looks like on correct tyres and what can he expect after putting on 437 wheels. What more can U expect?

Check out this:
http://www.tyresizecalculator.com/ty...dth-calculator

Guess what - 245 is the perfect size for 9J and 275 for 10J .
You can even put a 235 tyres on the front and it is acceptable. So is the 265 tyre. As you can see all the sizes are correct and the wheel width may vary depending on what you choose. Just have in mind that the wheel size will be a bit different than it should.

Anyway It is still far away from JDM style stance with stretched rubbers . They probably put 215/225 on a 9J .

Dude, you need to know a little more about ET before jumping to conclusion. ET is the distance from the inner edge to the sitting location and it does not have any relation to the width of rims

LOLOLOL made my day mr expert.

[upstate650]

JFC, you two - knock it off. M6 made a mistake and owned up to it. Wlodi - Stop trying to rub his nose in it, and M6 - just let it go.

[Wlodi]

Dude...
You started the discussion about tyre width...
Did it help anyhow? What does it change? I really can't see where you are going...

Its best to use factory 245/275mm tyres on non M car even if you are using different size rim. PERIOD

If the front wheel has little space on the 351 rims it will have less space on 437m with the same tyre. Anything else is just ideology. Nobody asked about putting on wider or narrower tyres. That is not the case here. The rim offset is.

What were you trying to tell us? That if the rim is to agressive on the 245 tyre than we should put on narrow tyres like your friend from Honda forum? How much width you save putting on a 225 wheel? 10mm on either side - some tyre stretch? 3mm? Good luck with that.

Im not a jerk - it just that sometimes I get irritated by others giving advice but lack basics and if someone proofs him wrong then he starts scratching and biting with nonsense arguments.