BMW 1-Series Forum (F20) 135i - 1Addicts.com > Second Generation 1 Series Forum > 2012 BMW 1-Series Sporthatch (F20) Discussion > Cross-drilled disc upgrade replacements for M135i
Post Reply
 
Thread Tools Search this Thread
      02-27-2014, 04:58 AM   #1
Madgambler
Private First Class
Madgambler's Avatar
United Kingdom
15
Rep
127
Posts

Drives: Hartge, M Xorst, Quaife, B1
Join Date: Apr 2013
Location: Surrey, UK

iTrader: (0)

Garage List
Rather than splashing out on the full M Sport brake kit I thought I'd look into replacing the discs alone on my little Bimmer and save a few grand.

Turns out that the folks in Germany have already thought of this. You can specify a cross-drilled vented set instead of just the normal vented discs for only 30 GBP more each. Special order but available as standard replacement stock.

I've put 34K miles under my wheels in about a year of driving and the original front pads still claim to have 9K left to wear, but judging by the brake fade and sponginess I doubt that's really true.

Will upgrade the rears to match at some point in the future. They still claim to have 14K left to run.
__________________
Madgambler
325i (E30) => Alpina B3.33 (E46) => Alpina B3s (E46) => 130i M Sport (E87) => Cayman S (987c) => Carrera S (997) => M135i (F21)
Appreciate 0
      02-27-2014, 06:04 AM   #2
sootyvrs
Lieutenant
sootyvrs's Avatar
35
Rep
485
Posts

Drives: BMW M340d
Join Date: Sep 2008
Location: NE UK

iTrader: (1)

Yes part numbers below for cross-drilled

http://www.realoem.com/bmw/showparts...49&hg=34&fg=07

http://www.realoem.com/bmw/showparts...70&hg=34&fg=12

Not sure if they give any advantages apart for perhaps aesthetics though?

I'm thinking about getting some Endless MX72 pads on mine which are reported to give much better brake feel than the std. pads
__________________
2018 BMW E87 M2
Appreciate 0
      02-27-2014, 06:21 AM   #3
Madgambler
Private First Class
Madgambler's Avatar
United Kingdom
15
Rep
127
Posts

Drives: Hartge, M Xorst, Quaife, B1
Join Date: Apr 2013
Location: Surrey, UK

iTrader: (0)

Garage List
I'm hoping for better heat dissipation and sportier looks at minimum cost (for a change).
__________________
Madgambler
325i (E30) => Alpina B3.33 (E46) => Alpina B3s (E46) => 130i M Sport (E87) => Cayman S (987c) => Carrera S (997) => M135i (F21)
Appreciate 0
      02-27-2014, 07:48 AM   #4
Benstermin
Life in Oversteer
Benstermin's Avatar
United Kingdom
0
Rep
20
Posts

Drives: F20 125i M Sport
Join Date: Feb 2013
Location: Essex

iTrader: (0)

I would agree with sooty on this. When I've had crossed drilled discs in the past they only cracked so not worth the extra over standard. Money better spent on pads.

Are the crossed drilled discs any bigger?
Come to think of it, are these not dimpled?
__________________

F20 125i M Sport
Appreciate 0
      02-27-2014, 01:26 PM   #5
Madgambler
Private First Class
Madgambler's Avatar
United Kingdom
15
Rep
127
Posts

Drives: Hartge, M Xorst, Quaife, B1
Join Date: Apr 2013
Location: Surrey, UK

iTrader: (0)

Garage List
I think the key word in the description is 'w/holes'. Shorthand for 'with holes' I'm guessing. So, no, not dimples.
__________________
Madgambler
325i (E30) => Alpina B3.33 (E46) => Alpina B3s (E46) => 130i M Sport (E87) => Cayman S (987c) => Carrera S (997) => M135i (F21)
Appreciate 0
      02-27-2014, 09:02 PM   #6
ttimbo
Major
ttimbo's Avatar
280
Rep
1,491
Posts

Drives: F48 X1 25i AW; F20 M135i AW
Join Date: Jan 2013
Location: Australia

iTrader: (0)

As above, I've had with cracking and warping when using drilled rotors. Personally, I prefer grooved or dimpled. If fade and sponginess is your issue, you'll probably get better results from a pad change (great to see some others, such as Endless, in the market) and fluid replacement
Appreciate 0
      02-28-2014, 12:44 AM   #7
ovekvam
Brigadier General
Norway
266
Rep
3,290
Posts

Drives: 2021 Galvanic Gold i3S
Join Date: Jun 2012
Location: Bryne, Norway

iTrader: (0)

I have also always avoided cross drilled rotors, since I have seen many cracked ones at track days. I have had grooved rotors, though.

Changing rotors or fluid will usually make no noticeable difference to the brake performance and feel, unless there was air trapped in the brake fluid. Pads can make a huge difference.
Appreciate 0
      02-28-2014, 01:58 AM   #8
SteveC
Major
United Kingdom
220
Rep
1,231
Posts

Drives: M5
Join Date: Jan 2009
Location: North East

iTrader: (1)

Brake performance

I must say that virtually every performance aspect of the M135 has exceeded my expectations except brakes, which I always felt lacked initial bite. They did improve after a few hundred miles but not to the point they are at the same level as the rest of the car.

Would be interested to hear if a pad swap brings marked improvements
Appreciate 0
      02-28-2014, 04:56 AM   #9
GeoBem007
Second Lieutenant
Belgium
28
Rep
233
Posts

Drives: F21 M135i
Join Date: Mar 2013
Location: Antwerp, Belgium

iTrader: (0)

My M-Performance brakes are dimpled, not drilled. They're not actual holes.
Appreciate 0
      03-02-2014, 05:10 AM   #10
Vtv8man
New Member
0
Rep
6
Posts

Drives: 09 WRX but M135i ordered
Join Date: Feb 2014
Location: Canberra

iTrader: (0)

As others have mentioned cross drilled discs will most likely crack or warp. I've upgraded the brakes on every car I've owned. The best discs are those that are grooved and vented from what I've used. Cross drilled look good but don't add much in the way of performance in my experience. In fact I grew to hate them as they were more prone to shudder if used at the track.

I usually go for pads first, then upgraded brake fluid, then braided lines and then discs. I also added a mater cylinder brace in my WRX. I also like pads with good initial bite where some people hate them. I've also added temporary brake ducts for previous cars at track days. I think pads will make a big difference if you can find some to suit.
Appreciate 0
      03-13-2014, 05:44 AM   #11
Madgambler
Private First Class
Madgambler's Avatar
United Kingdom
15
Rep
127
Posts

Drives: Hartge, M Xorst, Quaife, B1
Join Date: Apr 2013
Location: Surrey, UK

iTrader: (0)

Garage List
Quote:
Originally Posted by GeoBem007
My M-Performance brakes are dimpled, not drilled. They're not actual holes.
Bonus points to you. Dimpled and grooved they are : )
Attached Images
 
__________________
Madgambler
325i (E30) => Alpina B3.33 (E46) => Alpina B3s (E46) => 130i M Sport (E87) => Cayman S (987c) => Carrera S (997) => M135i (F21)

Last edited by Madgambler; 03-13-2014 at 07:46 AM..
Appreciate 0
      03-14-2014, 02:40 PM   #12
m.barn
Registered
0
Rep
2
Posts

Drives: M135i AW Auto
Join Date: Mar 2014
Location: Derby UK

iTrader: (0)

Any chance of revealing the price of the replacement discs, standard and these? Out of interest only..........I'm only 4k in.

They look great btw.
Appreciate 0
      03-15-2014, 08:42 AM   #13
Bee Pee
Brigadier General
United Kingdom
1736
Rep
4,496
Posts

Drives: AW M2 DCT
Join Date: Jun 2010
Location: SW London

iTrader: (3)

Difference in parts cost per axle between std v dimpled is abt £40 extra


Quote:
Originally Posted by m.barn View Post
Any chance of revealing the price of the replacement discs, standard and these? Out of interest only..........I'm only 4k in.

They look great btw.
Appreciate 0
      07-07-2014, 03:15 PM   #14
Gorro47
Private
35
Rep
58
Posts

Drives: BMW 125d, FocusRs17,E39m5, etc
Join Date: Jan 2014
Location: Portugal

iTrader: (0)

can i put this discs on a bmw f20?

I have those sporty purple brakes. Just thing the disc could look better

Thanks for your help
Appreciate 0
      07-07-2014, 04:18 PM   #15
JustChris
General
JustChris's Avatar
No_Country
17423
Rep
25,086
Posts

Drives: Tesla MYRWD
Join Date: Jul 2013
Location: UK

iTrader: (0)

Very interesting thanks for this. Do you have a close picture of the result please, are these the same size as the M235i M Perf discs, I'd assume so. Could you disclose the actual cost per disc please or willing to PM what you got them for?
__________________
My car made front page of Bimmerpost
Appreciate 0
      07-12-2014, 08:04 AM   #16
metrickid
Dinosaur supervisor
metrickid's Avatar
Netherlands
3027
Rep
4,214
Posts

Drives: E91 318d
Join Date: Feb 2007
Location: Autobahn

iTrader: (0)

Quote:
Originally Posted by ChesterM4 View Post
Very interesting thanks for this. Do you have a close picture of the result please, are these the same size as the M235i M Perf discs, I'd assume so. Could you disclose the actual cost per disc please or willing to PM what you got them for?
http://www.leebmann24.de/bmw-17-18-z...r-3er-4er.html

http://www.leebmann24.de/bmw-17zoll-...r-3er-4er.html
Appreciate 0
      07-13-2014, 09:14 AM   #17
sootyvrs
Lieutenant
sootyvrs's Avatar
35
Rep
485
Posts

Drives: BMW M340d
Join Date: Sep 2008
Location: NE UK

iTrader: (1)

The M Performance brake system uses a larger disc so not the same as the replacement discs for the std. braking system. That one is for use with the upgraded brakes (even though they use same calipers but in red, orange or yellow)

These are the ones you need for F22 M235i for replacing the original ones

http://www.realoem.com/bmw/showparts...49&hg=34&fg=07

http://www.realoem.com/bmw/showparts...70&hg=34&fg=12

This is the BMW M Performance braking system with the larger discs and replacement calipers

http://www.realoem.com/bmw/showparts...89&hg=34&fg=95
__________________
2018 BMW E87 M2
Appreciate 0
      07-13-2014, 09:57 AM   #18
flyaway
Private First Class
141
Rep
171
Posts

Drives: entry level M car,nothing more
Join Date: Mar 2014
Location: Belgium

iTrader: (0)

That's not what they are saying in the item description on the leebman24 site, where they clearly mention the rotors are compatible with the M135i stock brake system (blue one).

Additionally, the last link you posted with the M performance brake system lists the same rear brake rotor : 345X24 (34206797598), so the rotors does seem to be the same size with the stock ones.
Appreciate 0
      07-13-2014, 11:00 AM   #19
metrickid
Dinosaur supervisor
metrickid's Avatar
Netherlands
3027
Rep
4,214
Posts

Drives: E91 318d
Join Date: Feb 2007
Location: Autobahn

iTrader: (0)

Quote:
Originally Posted by sootyvrs View Post
The M Performance brake system uses a larger disc so not the same as the replacement discs for the std. braking system. That one is for use with the upgraded brakes (even though they use same calipers but in red, orange or yellow)

These are the ones you need for F22 M235i for replacing the original ones

http://www.realoem.com/bmw/showparts...49&hg=34&fg=07

http://www.realoem.com/bmw/showparts...70&hg=34&fg=12

This is the BMW M Performance braking system with the larger discs and replacement calipers

http://www.realoem.com/bmw/showparts...89&hg=34&fg=95
They are the correct discs, I don't know what you are getting at. The URL's clearly states what vehicles they fit on and you fill in your VIN-number so they will send exactly the disc you need.

Quote:
Originally Posted by Leebmann24
1er F20/F21: M135i und M135i xDrive Fahrzeuge mit Serienbremse
Appreciate 0
      07-14-2014, 06:03 AM   #20
sootyvrs
Lieutenant
sootyvrs's Avatar
35
Rep
485
Posts

Drives: BMW M340d
Join Date: Sep 2008
Location: NE UK

iTrader: (1)

Quote:
Originally Posted by Rossifumi View Post
They are the correct discs, I don't know what you are getting at. The URL's clearly states what vehicles they fit on and you fill in your VIN-number so they will send exactly the disc you need.
Sorry I don't speak German so couldn't do a translation but just seen the image of the BMW M Performance brake kit with red calipers so assumed these are the larger discs (min 18" wheels) to the std. discs (which you can get in cross/drilled also as per my link for 17" wheels).

I think they have used the wrong image (below) in the link as they are the larger discs
__________________
2018 BMW E87 M2
Appreciate 0
      07-14-2014, 06:14 AM   #21
ovekvam
Brigadier General
Norway
266
Rep
3,290
Posts

Drives: 2021 Galvanic Gold i3S
Join Date: Jun 2012
Location: Bryne, Norway

iTrader: (0)

It is difficult to find reliable info on the brake specs on the internet, but I have tried. My conclusion so far is that the M-Sport brakes and the Performance brakes use the same caliper. The Performance rotors are made of a different material, and are lighter at the same size.

Don't take this info as facts.
Appreciate 0
      07-14-2014, 01:06 PM   #22
Madgambler
Private First Class
Madgambler's Avatar
United Kingdom
15
Rep
127
Posts

Drives: Hartge, M Xorst, Quaife, B1
Join Date: Apr 2013
Location: Surrey, UK

iTrader: (0)

Garage List
Quote:
Originally Posted by ovekvam
It is difficult to find reliable info on the brake specs on the internet, but I have tried. My conclusion so far is that the M-Sport brakes and the Performance brakes use the same caliper. The Performance rotors are made of a different material, and are lighter at the same size.

Don't take this info as facts.
My new rotors fitted just fine with my blue M Performance callipers.

But, and here's the annoying thing, the brake ducts now emit a regular 'chuffing' noise that echoes back through front windows when open.

This is an audible noise that disappears under braking, i.e. is not a sticking pot or warped rotor. Braking is not affected by this noise at all and there's no adverse affect on mpg.

I took a car tech for a ride and he agreed the noise was just disturbed air pulsating through the standard duct.
__________________
Madgambler
325i (E30) => Alpina B3.33 (E46) => Alpina B3s (E46) => 130i M Sport (E87) => Cayman S (987c) => Carrera S (997) => M135i (F21)
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 06:36 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST