Brake rotor size

BigMacSmallFries · 02-02-2014, 12:17 PM

Anyone know the size of the brake rotors? It's one of the last few pieces of info we don't have. I'm guessing 14.6" for the front standard brakes, and 15.6" for the CC brakes. I don't see it anywhere.

Brosef · 02-02-2014, 01:48 PM

I'm not sure they've been released, as I've looked for the specs myself. does anyone know the specs of the e9x M3 brakes and the new F30 M performance brakes? it looks like the standard brakes use the same calipers as the F30 M brakes, but has bigger rotors (and I'm sure the rotors are bigger than the outgoing M3 rotors... My guess is 365-370 mm up front).

Sedan_Clan · 02-02-2014, 02:14 PM

Quote:

Originally Posted by Brosef

I'm not sure they've been released, as I've looked for the specs myself. does anyone know the specs of the e9x M3 brakes and the new F30 M performance brakes? it looks like the standard brakes use the same calipers as the F30 M brakes, but has bigger rotors (and I'm sure the rotors are bigger than the outgoing M3 rotors... My guess is 365-370 mm up front).

I'll check my M Performance rotor sizes. I think the new M3 rotors will be the same or similar size.

Floridagator · 02-02-2014, 02:29 PM

Front discs are 380mm. Rear are 370mm.

Brosef · 02-02-2014, 02:32 PM

Quote:

Originally Posted by Floridagator

Front discs are 380mm. Rear are 370mm.

wow, those are huge. awesome. I even thought the 380mm Brembos on my e92 were overkill for its size/weight

swamp2 · 02-02-2014, 02:41 PM

Although it is not entirely clear if they are speaking specifically about the M3/4 front CSiC brake rotor, a size of 410 mm is quoted for the front rotor, that is a whopping 16.1".

hwelvaar · 02-02-2014, 04:08 PM

The video clearly shows a Brembo logo on the brakes, together with BMW logo.
Must have been co-development.
I suppose this is good !

BigMacSmallFries · 02-02-2014, 04:12 PM

Quote:

Originally Posted by Floridagator

Front discs are 380mm. Rear are 370mm.

Quote:

Originally Posted by Brosef

wow, those are huge. awesome. I even thought the 380mm Brembos on my e92 were overkill for its size/weight

Quote:

Originally Posted by swamp2

Although it is not entirely clear if they are speaking specifically about the M3/4 front CSiC brake rotor, a size of 410 mm is quoted for the front rotor, that is a whopping 16.1".

The 18" wheels can fit the standard brakes. There's no 15" brake rotors plus calipers out there that will fit in 18" wheels. The most is around 14.7" give or take a touch depending on the calipers. Similarly the largest brake rotors 19" wheels can fit is around 15.7" give or take a touch. The 16.1" rotors only fit 20" wheels on the M5, you can't mount 19s with those. Basically, 14.7 and 15.7 give or take a tenth is the largest they can be.

Sedan_Clan · 02-02-2014, 04:25 PM

Quote:

Originally Posted by hwelvaar

The video clearly shows a Brembo logo on the brakes, together with BMW logo.
Must have been co-development.
I suppose this is good !

The M-Performance brakes are made by Brembo as are the OEM M-Sport 335i brakes.

Tonymiabmw · 02-02-2014, 04:44 PM

Anyone know what color the rotors are on the standard brakes? Are they gonna be blue like m5

Floridagator · 02-02-2014, 04:56 PM

1) Can we stop using inches? No one, not even the American automakers, use the English system anymore (except for wheel diameters). Metric is the dominant system of measurement worldwide.

2) A 380mm disc will fit in an 18" wheel. You just need a compact caliper to do it.

Floridagator · 02-02-2014, 04:58 PM

Quote:

Originally Posted by Tonymiabmw

Anyone know what color the rotors are on the standard brakes? Are they gonna be blue like m5

Assuming you are referring to the calipers, yes, the standard ones are blue.

Tonymiabmw · 02-02-2014, 05:21 PM

Quote:

Originally Posted by Floridagator

Quote:

Originally Posted by Tonymiabmw

Anyone know what color the rotors are on the standard brakes? Are they gonna be blue like m5

Assuming you are referring to the calipers, yes, the standard ones are blue.

Oops yeah calipers, long night last night.....

Sedan_Clan · 02-02-2014, 05:23 PM

Considering there are 4 available colors, it would've been awesome if BMW allowed you to pick your caliper color.

paddy335 · 02-02-2014, 05:29 PM

Quote:

Originally Posted by Floridagator

1) Can we stop using inches? No one, not even the American automakers, use the English system anymore (except for wheel diameters). Metric is the dominant system of measurement worldwide.
.

Yes please!!

paddy335 · 02-02-2014, 05:30 PM

Quote:

Originally Posted by Sedan_Clan

Considering there are 4 available colors, it would've been awesome if BMW allowed you to pick your caliper color.

I am sure they would be happy to paint them whatever colour you desire, for a small fee

Sedan_Clan · 02-02-2014, 05:32 PM

Quote:

Originally Posted by paddy335

Quote:

Originally Posted by Sedan_Clan

Considering there are 4 available colors, it would've been awesome if BMW allowed you to pick your caliper color.

I am sure they would be happy to paint them whatever colour you desire, for a small fee

That's just it. No need for that!

There are already kits in red, orange and yellow available alongside the blue.

CanAutM3 · 02-02-2014, 07:37 PM

Quote:

Originally Posted by swamp2

Although it is not entirely clear if they are speaking specifically about the M3/4 front CSiC brake rotor, a size of 410 mm is quoted for the front rotor, that is a whopping 16.1".

I believe this video is about the M5/M6 CCB and not the M3/M4.

They mention 20kg total saving, which is the weight saving on the M5. I believe the total weight saving on the F8X is around 6-7kg...

The rotors on the F8X could however still be the same size as on the F1X.

solstice · 02-02-2014, 07:47 PM

Quote:

Originally Posted by CanAutM3

I believe this video is about the M5/M6 CCB and not the M3/M4.

They mention 20kg total saving, which is the weight saving on the M5. I believe the total weight saving on the F8X is around 6-7kg...

The rotors on the F8X could however still be the same size as on the F1X.

Doesn't the F1X CCBs require 20s? The rotors and calipers are monstrous. It looks like you can hardly fit a paper between the calipers and 20s. The standard F1X M brakes aren't small but they look tiny next to a CCB equipped car. I had the chance to view them side by side recently. The CCB car was a frozen silver M6GC loaded to the hilt, absolutely stunning looking car.

Boss330 · 02-03-2014, 06:11 AM

Quote:

Originally Posted by solstice

Doesn't the F1X CCBs require 20s? The rotors and calipers are monstrous. It looks like you can hardly fit a paper between the calipers and 20s. The standard F1X M brakes aren't small but they look tiny next to a CCB equipped car. I had the chance to view them side by side recently. The CCB car was a frozen silver M6GC loaded to the hilt, absolutely stunning looking car.

The std F1x M brakes are 400mm
The CCB F1x M brakes are 410mm

https://m-power.com/_open/b/varlink2...d=2769&lang=en

It is correct that CCB requires 20" wheels

swamp2 · 02-04-2014, 06:02 PM

Bummer, still no form answer on the sizes of either cast iron nor CSiC. Floridagator: Can you provide your source?

Boss330 · 02-05-2014, 12:52 PM

Quote:

Originally Posted by swamp2

Bummer, still no form answer on the sizes of either cast iron nor CSiC. Floridagator: Can you provide your source?

Can't vouch for the accuracy, but in Auto Bild Sportscars Magazine (February 2014 edition) they have the following brake sizes listed in the spec sheet:

Steel brakes:
380mm front / 370mm rear

CCB:
400mm front / 380mm rear

CCB requires 19" wheels according to the BMW configurators that are online at the moment.

02-02-2014, 12:17 PM	#1
BigMacSmallFries First Lieutenant 123 Rep 353 Posts Drives: '19 M5C 911 Turbo F430 GT3 RS Join Date: Aug 2010 Location: N/A iTrader: (1)	Brake rotor size Anyone know the size of the brake rotors? It's one of the last few pieces of info we don't have. I'm guessing 14.6" for the front standard brakes, and 15.6" for the CC brakes. I don't see it anywhere.
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02-02-2014, 01:48 PM	#2
Brosef Brigadier General 875 Rep 3,450 Posts Drives: F90 M5 Join Date: Aug 2009 Location: Chicago iTrader: (4)	I'm not sure they've been released, as I've looked for the specs myself. does anyone know the specs of the e9x M3 brakes and the new F30 M performance brakes? it looks like the standard brakes use the same calipers as the F30 M brakes, but has bigger rotors (and I'm sure the rotors are bigger than the outgoing M3 rotors... My guess is 365-370 mm up front).
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02-02-2014, 02:29 PM	#4
Floridagator Obsessed with braking 39 Rep 82 Posts Drives: 2015 BMW M3 Join Date: Jan 2010 Location: White Lake, MI iTrader: (0) Garage List 2015 BMW M3 [0.00]	F80 M3 Brake Disc Diameter Front discs are 380mm. Rear are 370mm.
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02-02-2014, 02:41 PM	#6
swamp2 Lieutenant General 609 Rep 10,407 Posts Drives: E92 M3 Join Date: Sep 2006 Location: San Diego, CA USA iTrader: (3)	Although it is not entirely clear if they are speaking specifically about the M3/4 front CSiC brake rotor, a size of 410 mm is quoted for the front rotor, that is a whopping 16.1". __________________ E92 M3 \| Space Gray on Fox Red \| M-DCT \| CF Roof \| RAC RG63 Wheels \| Brembo 380mm BBK \| \| Vorsteiner Ti Exhaust \| Matte Black Grilles/Side Gills/Rear Emblem/Mirrors \| \| Alekshop Back up Camera \| GP Thunders \| BMW Aluminum Pedals \| Elite Angels \| \| XPEL Full Front Wrap \| Hardwired V1 \| Interior Xenon Light Kit \|
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02-02-2014, 04:08 PM	#7
hwelvaar Major 112 Rep 1,140 Posts Drives: BMW M135i MT Join Date: Jan 2008 Location: Belgium iTrader: (0)	The video clearly shows a Brembo logo on the brakes, together with BMW logo. Must have been co-development. I suppose this is good !
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02-02-2014, 04:44 PM	#10
Tonymiabmw Colonel 552 Rep 2,633 Posts Drives: Nardo F90 M5 on order Join Date: Oct 2013 Location: In Transit iTrader: (1)	Anyone know what color the rotors are on the standard brakes? Are they gonna be blue like m5
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02-02-2014, 04:56 PM	#11
Floridagator Obsessed with braking 39 Rep 82 Posts Drives: 2015 BMW M3 Join Date: Jan 2010 Location: White Lake, MI iTrader: (0) Garage List 2015 BMW M3 [0.00]	1) Can we stop using inches? No one, not even the American automakers, use the English system anymore (except for wheel diameters). Metric is the dominant system of measurement worldwide. 2) A 380mm disc will fit in an 18" wheel. You just need a compact caliper to do it.
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02-02-2014, 05:23 PM	#14
Sedan_Clan Law Enforcer 24976 Rep 22,265 Posts Drives: '22 Chalk Gray Porsche C2S Join Date: Jun 2006 Location: ..in your rearview!!! iTrader: (26)	Considering there are 4 available colors, it would've been awesome if BMW allowed you to pick your caliper color.
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02-04-2014, 06:02 PM	#21
swamp2 Lieutenant General 609 Rep 10,407 Posts Drives: E92 M3 Join Date: Sep 2006 Location: San Diego, CA USA iTrader: (3)	Bummer, still no form answer on the sizes of either cast iron nor CSiC. Floridagator: Can you provide your source? __________________ E92 M3 \| Space Gray on Fox Red \| M-DCT \| CF Roof \| RAC RG63 Wheels \| Brembo 380mm BBK \| \| Vorsteiner Ti Exhaust \| Matte Black Grilles/Side Gills/Rear Emblem/Mirrors \| \| Alekshop Back up Camera \| GP Thunders \| BMW Aluminum Pedals \| Elite Angels \| \| XPEL Full Front Wrap \| Hardwired V1 \| Interior Xenon Light Kit \|
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