[F30 EB 328i]

Do anybody know that the M3 brake disks can be also fit on the M-Sport brake which is 370mm for the front and 345mm at the back.

[metrickid]

If you look at the part number it says that the brakes are the same on the M Sport brakes and the M3 so then the disc should work too.

But this might be old data though as it sounds weird. Why would a 328i have the same brakes as a M3.

http://www.leebmann24.de/bmw-ersatzt...er=34116799469

[.BMW.]

Front brake caliper part numbers:
F30 low power models M Sport brakes (340mm rotors)
left - 34 11 6 799 465
right - 34 11 6 799 466

F30 high power models M Sport brakes (370mm rotors)
left - 34 11 6 799 469
right - 34 11 6 799 470

F80 stock brakes (rotor size unknown)
left - 34 11 6 799 469
right - 34 11 6 799 470

Rear brake caliper part numbers:
F30 all models M Sport brakes (345mm rotors)
left - 34 21 6 799 461
right - 34 21 6 799 462

F80 stock brakes (rotor size unknown)
left - 34 21 6 860 737
right - 34 21 6 860 738

The front calipers has the same part number on high power F30 models with M Sport brakes as on F80 with stock brakes. The rear calipers differs.

I haven't found rotor sizes for stock F80 brakes, but since it comes with 18" wheels stock the front rotor can't be larger than 370-375mm to make room for the calipers.

If you can verify that the front rotor size on F80 are 370x30mm there is a good possibility that they fit also on F30.

[M-terkait]

i have seen them irl at the dealer and they looked a bit bigger but is it from the drilled holes or is it really bigger by 10mm ;I'm not sure that an eye can tell 1cm+ on a 37cm diameter :x

[oceanview]

On the German BMW Website they mention the rotor sizes for the F80/F81:
http://www.bmw.de/de/neufahrzeuge/M/...hrdynamik.html

M Compound Brake
Front = 380mm
Rear = 370mm

M Carbon-Ceramic Brake
Front = 400mm
Rear = 380mm

[peterparker]

Has any tired this yet? I'm pretty sure the M3/4 rotor is lighter, looks better and is about the same price as the 370mm rotor.

[DrifterX]

The M3/4 rotor would be definitely lighter because it has the aluminum hat.

I'm skeptical that you would be able to fit them to an F3x because the mounting position looks different meaning the hub/knuckle is different but this is purely based on the pictures I've seen (below). Notice how the F3x caliper is positioned compared to the F8x caliper; F3x is angled towards the front wheres the F8x is angled towards the rear. Similar can be said about the rear calipers.

I'd still love to try it myself though... lol

F32


F80

[G30 B58]

Good stuff here guys.

[DrifterX]

Follow up from my last post; looks like the upright/carrier for the hubs are definitely different part... they look completely different and have different part numbers based on realoem. I highly doubt the F8x rotors would work on F3x vehicles without other mods... not worth it IMO, you're maybe better off getting the M Performance rotors + upgraded pads if you have M Sport Brakes from factory.

F32:
http://www.realoem.com/bmw/showparts...73&hg=31&fg=10


F82:
http://www.realoem.com/bmw/showparts...22&hg=31&fg=10

[shivaswrath]

I've tracked a few times with the M Perf brakes (apparently same as the M sport but with dimples on the rotors).
I had an impossible time really beating those brakes up on Lime Rock...4 20 minute sessions where I would drop speed from 118 to 60//80 to 40 multiple times. No fade. No shudder. Pretty much perfect.

Unsure how M3 brakes can exceed that??!!

[Shazsta]

Originally Posted by DrifterX

F80
Attachment 1150056

What wheels are these?

[DrifterX]

Originally Posted by Shazsta

What wheels are these?

18" BBS FI wheels. Very nice wheels but extremely expensive

This is where I got the pic from...
http://ind-distribution.com/blog/?p=2726

[Shazsta]

Originally Posted by DrifterX

18" BBS FI wheels. Very nice wheels but extremely expensive

This is where I got the pic from...
http://ind-distribution.com/blog/?p=2726

Never fear there is a new set out that is about 80% of the looks at about 1/10th the price

http://www.tirerack.com/wheels/Wheel...All&sort=Brand

[ska///235i]

Originally Posted by Shazsta

Never fear there is a new set out that is about 80% of the looks at about 1/10th the price

http://www.tirerack.com/wheels/Wheel...All&sort=Brand

Rs look nothing like the other one in person

[Shazsta]

Well that sucks

[DrifterX]

Originally Posted by Shazsta

Never fear there is a new set out that is about 80% of the looks at about 1/10th the price

http://www.tirerack.com/wheels/Wheel...All&sort=Brand

I've looked at the BBS SR wheels before but they're way too heavy for the price... 19x8.5 are at 29.9 lbs because they're pressure cast wheels. You can get nicer looking flow formed wheels for the same price but they're 20-25% lighter.

[Shazsta]

Well that sux x2. I really like the FI wheels but @ ~$2k a wheel it's a non-starter

[Bee Pee]

Off topic !

[feuer]

Originally Posted by shivaswrath

I've tracked a few times with the M Perf brakes (apparently same as the M sport but with dimples on the rotors).
I had an impossible time really beating those brakes up on Lime Rock...4 20 minute sessions where I would drop speed from 118 to 60//80 to 40 multiple times. No fade. No shudder. Pretty much perfect.

Unsure how M3 brakes can exceed that??!!

M3 rotor is larger diameter and also little thicker too. On top the brake pads are different compound. So yes, they will out perform the f30 M Sport or M Performance.

[feuer]

Originally Posted by DrifterX

The M3/4 rotor would be definitely lighter because it has the aluminum hat.

I'm skeptical that you would be able to fit them to an F3x because the mounting position looks different meaning the hub/knuckle is different

Both rotors have aluminum hats. Not sure about the weight. M3/4 rotors are no go on non M F-chassis due to different knuckle as you have stated.

[Bee Pee]

Originally Posted by feuer

M3/4 rotors are no go on non M F-chassis due to different knuckle as you have stated.

Correct - the photos in post # 7 above should give you a visual clue that the mounts are different given the larger rotor but same caliper....

F32 - caliper position almost at 9 o'clock


F80 - caliper position lower - rotated slightly downwards CCW - than F32 position....

[david51]

If the mounting bracket is the same, assembly is possible