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      09-24-2017, 07:25 AM   #1
drantispy
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M6 Gran Coupe alloy Wheels on 640d Gran Coupe

Just swaped my msport alloy wheels with the 433m original M6 GC alloy wheels but the rear ones are out of fender by 18mm. Would like to have a flush look - does anyone know what it needs to be done?

Thanks a lot in advance
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      09-24-2017, 10:13 AM   #2
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do you have the 9.5 all around square setup?
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      09-24-2017, 10:35 AM   #3
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Quote:
Originally Posted by jackliu0527 View Post
do you have the 9.5 all around square setup?

No i have the 9.5 front and 10.5 rear
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      09-24-2017, 12:14 PM   #4
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Quote:
Originally Posted by drantispy View Post
No i have the 9.5 front and 10.5 rear
o wow, I thought the OEM 433M dont fit on 640 650, did you have to u put spacers on it?
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      09-24-2017, 12:55 PM   #5
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Quote:
Originally Posted by jackliu0527 View Post
o wow, I thought the OEM 433M dont fit on 640 650, did you have to u put spacers on it?
No spacers! Front ones fit perfectly. Rear ones extend by 18mm from the fender.
I need to figure out how to make them fit flat
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      09-24-2017, 03:51 PM   #6
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Flare the fenders is the only option. There is nothing you can do to the wheels.
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      09-24-2017, 04:12 PM   #7
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Originally Posted by Walt White Coupe View Post
Flare the fenders is the only option. There is nothing you can do to the wheels.
There should be another option. Whats the difference between 640/650 and the m6 rear end?
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      09-24-2017, 07:59 PM   #8
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Quote:
Originally Posted by drantispy View Post
There should be another option. Whats the difference between 640/650 and the m6 rear end?
You can find two more front wheels and mount them on the rear.
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      09-25-2017, 05:48 AM   #9
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Quote:
Originally Posted by drantispy View Post
There should be another option. Whats the difference between 640/650 and the m6 rear end?
The whole M6 body is wider to accommodate the additional width.

This issue has been known about for a while (even the F10 M5 rear wheels are narrower than the M6 version). You can find another set of front wheels for the rear or find a set of M5 ones and they will fit (F10 version is 1/2 inch narrower).

As said above though you either roll the arch or change the wheel, there is no other option as you need to move the wheel further inboard to get it to sit properly.
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      09-25-2017, 07:34 AM   #10
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Quote:
Originally Posted by NINJA59 View Post
The whole M6 body is wider to accommodate the additional width.

This issue has been known about for a while (even the F10 M5 rear wheels are narrower than the M6 version). You can find another set of front wheels for the rear or find a set of M5 ones and they will fit (F10 version is 1/2 inch narrower).

As said above though you either roll the arch or change the wheel, there is no other option as you need to move the wheel further inboard to get it to sit properly.
the rear body of the m6 is not wider according to my research ... maybe i am wrong. it seems that the wheel base of the m6 is smaller than the 640...
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      09-25-2017, 07:59 AM   #11
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shit looks nice
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      09-25-2017, 11:40 AM   #12
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Quote:
Originally Posted by drantispy View Post
the rear body of the m6 is not wider according to my research ... maybe i am wrong. it seems that the wheel base of the m6 is smaller than the 640...
yes - the suspension geometry/axle width is different. The rears don't fit, period, unless you like the wheels sticking out that far, which will sandblast the paint off your fenders, by the way.
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Last edited by upstate650; 09-25-2017 at 02:09 PM..
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      09-25-2017, 01:38 PM   #13
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How about more rear camber and a subtle stretch on the tyres?
Surely you can find 6mm a side - I have 12mm spacers on my standard 20s and the fitment is bang on.
I say those wheels look awesome and with some subtle tweaks I'd love to see you getting them to 'work'. Good look with it, fingers crossed you get it.
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      09-25-2017, 03:04 PM   #14
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Quote:
Originally Posted by Dodge_Gowans View Post
How about more rear camber and a subtle stretch on the tyres?
Surely you can find 6mm a side - I have 12mm spacers on my standard 20s and the fitment is bang on.
I say those wheels look awesome and with some subtle tweaks I'd love to see you getting them to 'work'. Good look with it, fingers crossed you get it.
LOL - camber on a 6 series? The tires wouldn't last a 1000 miles on our pigs. If it was only 6mm per side he could probably bore out the wheels but 18mm is way too much for that.
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      09-25-2017, 03:08 PM   #15
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Quote:
Originally Posted by drantispy View Post
the rear body of the m6 is not wider according to my research ... maybe i am wrong. it seems that the wheel base of the m6 is smaller than the 640...
It's a well known fact that all M cars are wider than their standard equivalents with a wider body to accommodate the wider track width front and back. Audi RS are the same as are proper AMG cars at Mercedes.

Your options are to roll your wheel arches or ditch the wheels. You can disguise the issue by running narrower tyres which will give a stretched look but you cannot reduce how much the wheel rim protrudes from the body of the car.

No offense, but I'm amazed that you went through with shelling out for genuine M6 GC wheels without having checked on this. As I said earlier it's no secret that the dimensions are different and I'm not sure why you would think that an M car would have a narrower track than a standard model. That makes absolutely no sense.

Best of luck with it.
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      09-25-2017, 03:18 PM   #16
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Originally Posted by Derboy View Post
It's a well known fact that all M cars are wider than their standard equivalents with a wider body to accommodate the wider track width front and back. Audi RS are the same as are proper AMG cars at Mercedes.

Your options are to roll your wheel arches or ditch the wheels. You can disguise the issue by running narrower tyres which will give a stretched look but you cannot reduce how much the wheel rim protrudes from the body of the car.

No offense, but I'm amazed that you went through with shelling out for genuine M6 GC wheels without having checked on this. As I said earlier it's no secret that the dimensions are different and I'm not sure why you would think that an M car would have a narrower track than a standard model. That makes absolutely no sense.

Best of luck with it.
The bolded above is dead wrong as it relates to the 6 series and M6.

I agree the OP buying these wheels without checking to see if they would fit is surprising. After all, its not like he is new to modding his car - he has CCB brakes on it.
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      09-26-2017, 05:04 AM   #17
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Quote:
Originally Posted by upstate650 View Post
The bolded above is dead wrong as it relates to the 6 series and M6.
How is it?

Grand coupe width is 1894mm
M6 Grand coupe width is 2106mm

That's 106mm per side wider than the standard car.
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      09-26-2017, 11:02 AM   #18
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Originally Posted by Derboy View Post
How is it?

Grand coupe width is 1894mm
M6 Grand coupe width is 2106mm

That's 106mm per side wider than the standard car.
Where are you getting those numbers from? You think the M6 is almost 10" wider than the regular 6 series?

All the rear end bumpers and spoilers are interchangeable between them. My quick internet research shows they have an identical width of 74.6 inches.

10" wider? are you looking at the M6 cup car???

Actually, neither of those numbers you cite are anywhere near correct for either car. 1894 mm is 86" - over 7 feet wide! and 2106 mm is a full 8 feet wide!
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Last edited by upstate650; 09-26-2017 at 11:26 AM..
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      09-26-2017, 02:40 PM   #19
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Quote:
Originally Posted by upstate650 View Post
Where are you getting those numbers from? You think the M6 is almost 10" wider than the regular 6 series?

All the rear end bumpers and spoilers are interchangeable between them. My quick internet research shows they have an identical width of 74.6 inches.

10" wider? are you looking at the M6 cup car???

Actually, neither of those numbers you cite are anywhere near correct for either car. 1894 mm is 86" - over 7 feet wide! and 2106 mm is a full 8 feet wide!
Lol! Sorry. I quoted those numbers without even thinking about it. Having looked into it, I stand corrected. The M6 is wider at the front with a wider track width at the front. The rears are down to the wheel width and offset and as previously stated you can’t increase a wheel offset, you can only reduce it through using spacers.
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      10-03-2017, 10:59 AM   #20
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What if i exchange my m6 alloy wheels with the original 601m m5 f10 alloy wheels and original m5 wheel setup front and rear. Am i still gonna have issues?
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      10-03-2017, 02:13 PM   #21
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Originally Posted by drantispy View Post
What if i exchange my m6 alloy wheels with the original 601m m5 f10 alloy wheels and original m5 wheel setup front and rear. Am i still gonna have issues?
M5 wheels are a perfect fit on the 6 series, but if you have xdrive you will want to change from 265/35 on the front to 255/35 to get the same circumference as the 295/30 rears.
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      10-06-2017, 12:47 PM   #22
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Quote:
Originally Posted by drantispy View Post
No spacers! Front ones fit perfectly. Rear ones extend by 18mm from the fender.
I need to figure out how to make them fit flat
I must be the only one here that loves this look. 18mm out from the fender looks PERFECT. Everyone wants that staggered look!

The last thing I would do is to roll the fenders or add "flares" to it.

BTW, do you have CCBs?
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