OEM Brake Disc Diameters

M3V8Driver · 09-02-2009, 04:08 PM

Interestingly, I searched this forum for this information and couldn't find it, so I thought I'd post it here in the hopes that it makes it to a "sticky"

The following is the same for all versions of the E9x M3:
Front disc diameter: 14.2", or 360.68mm
Rear disc diameter: 13.8", or 350.52mm

What I'd like to see somebody add is the inside diameters of the OEM 18" and 19" wheels. This should help those considering a BBK make an informed decision, especially if you're designing your own, like I have done in the past. Of course, different calipers have different profiles, so that will need to be taken into consideration too. In order to fit a considerably larger diameter disc within the ID of an OEM wheel, you need a low profile caliper, which AP Racing and Brember make (not sure about StopTech, Wilwood, and others).

!Xoible · 09-02-2009, 04:15 PM

LOL

here man
http://www.bmwusa.com/Standard/Conte...fications.aspx

M3V8Driver · 09-02-2009, 08:16 PM

Quote:

Originally Posted by !Xoible

LOL

here man
http://www.bmwusa.com/Standard/Conte...fications.aspx

Haha, thanks

Too bad BBKs don't come in inches. Anywho, here's my favorite tidbit from the link:

Wheels dimensions, front/rear265/40

They list tires sizes for wheel dimensions, and they DO NOT give inside diameters, so what good is that link?

aus · 09-02-2009, 09:08 PM

360mm front rotor's not bad at all. Too bad there's no ducting.

09-02-2009, 04:08 PM	#1
M3V8Driver Captain 73 Rep 724 Posts Drives: E92 M3 - DCT Join Date: Mar 2009 Location: Pittsburgh, PA iTrader: (0)	OEM Brake Disc Diameters Interestingly, I searched this forum for this information and couldn't find it, so I thought I'd post it here in the hopes that it makes it to a "sticky" The following is the same for all versions of the E9x M3: Front disc diameter: 14.2", or 360.68mm Rear disc diameter: 13.8", or 350.52mm What I'd like to see somebody add is the inside diameters of the OEM 18" and 19" wheels. This should help those considering a BBK make an informed decision, especially if you're designing your own, like I have done in the past. Of course, different calipers have different profiles, so that will need to be taken into consideration too. In order to fit a considerably larger diameter disc within the ID of an OEM wheel, you need a low profile caliper, which AP Racing and Brember make (not sure about StopTech, Wilwood, and others). __________________ Mmmm... M&Ms, Dale
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09-02-2009, 04:15 PM	#2
!Xoible Banned 837 Rep 46,029 Posts Drives: .... Join Date: Nov 2006 Location: . iTrader: (4) Garage List 2008 M3 [4.00] 2007 335i [9.00] 2008 528i [8.00] 2006 Infiniti - G35 ... [8.00]	LOL here man http://www.bmwusa.com/Standard/Conte...fications.aspx
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09-02-2009, 09:08 PM	#4
aus Major General 892 Rep 9,032 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	360mm front rotor's not bad at all. Too bad there's no ducting. __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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