THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum Technical Topics Suspension | Chassis | Brakes What are the wings on pads for?

Post Reply
 
Thread Tools Search this Thread
      06-09-2019, 10:29 AM   #1
DrivingPassion
Lieutenant
DrivingPassion's Avatar
United_States
129
Rep
485
Posts

Drives: '15 M235xi
Join Date: Nov 2006
Location: WA

iTrader: (0)

What are the wings on pads for?

Can you tell me what these wings are for on the pads?
Attached Images
 
__________________
2015 M235i xDrive 8AT
Appreciate 0
      06-09-2019, 10:47 AM   #2
Pairadime
New Member
7
Rep
26
Posts

Drives: 2015 M235i
Join Date: Jun 2018
Location: British Columbia

iTrader: (0)

Counter weights to attenuate noise and vibration....I'm just guessing but that kinda makes sense.
Appreciate 0
      06-10-2019, 10:11 AM   #3
Maynard
Colonel
United_States
3805
Rep
2,860
Posts

Drives: 228iX & M2C
Join Date: Mar 2016
Location: Upstate NY

iTrader: (1)

^ This is what I've been told as well. My track pads don't have them. And for brake Q's I'd put in a plug for Zeckhausen Racing - they customize their recommendations, and I got a ton of useful info when I called to order.
Appreciate 0
      06-10-2019, 10:24 AM   #4
DrivingPassion
Lieutenant
DrivingPassion's Avatar
United_States
129
Rep
485
Posts

Drives: '15 M235xi
Join Date: Nov 2006
Location: WA

iTrader: (0)

They seem to break off easily: quite brittle.
Appreciate 0
      06-10-2019, 10:31 AM   #5
DrivingPassion
Lieutenant
DrivingPassion's Avatar
United_States
129
Rep
485
Posts

Drives: '15 M235xi
Join Date: Nov 2006
Location: WA

iTrader: (0)

So, it’s not a safety related feature, then?
The 2 long pins that run through both pads are the safety fasteners, correct?
Appreciate 0
      06-10-2019, 08:16 PM   #6
Pairadime
New Member
7
Rep
26
Posts

Drives: 2015 M235i
Join Date: Jun 2018
Location: British Columbia

iTrader: (0)

I took a grinder to mine yesterday so my 17" track wheels would fit in the back. It makes me laugh that these cars need more brake clearance in the rear compared to the front. Doesn't seem to affect braking performance so far. It makes sense that track pads don't have them. They are usually much louder then street pads.
Appreciate 0
      06-12-2019, 10:38 PM   #7
ggggbmw
Lieutenant
430
Rep
436
Posts

Drives: 2017 M2 Manual
Join Date: Jan 2017
Location: Minnesota

iTrader: (0)

Quote:
Originally Posted by Pairadime View Post
Counter weights to attenuate noise and vibration....I'm just guessing but that kinda makes sense.
I've been told the same thing by a couple of senior BMW dealer mechanics. (Both serious racers, from car families, so they aren't hacks. I guess they could be repeating folklore , but I think they are right.)
Appreciate 0
      06-13-2019, 02:16 AM   #8
aerobod
Car Geek
aerobod's Avatar
3578
Rep
3,555
Posts

Drives: Caterham R500, M2-G87, Macan S
Join Date: Mar 2008
Location: Calgary

iTrader: (0)

The small brake pad weights are for noise reduction and work in two ways:

- reduce squeal frequency due to added mass, hence a lower pitched sound.
- split the resonance peak if the weight is properly matched to it’s attachment plate to oscillate in anti-phase to the pad, hence reducing resonance peak gain.
Appreciate 1
Maynard3804.50
      06-13-2019, 08:23 PM   #9
Pairadime
New Member
7
Rep
26
Posts

Drives: 2015 M235i
Join Date: Jun 2018
Location: British Columbia

iTrader: (0)

I am happy to report, grinding these weights down don't seem to make the brakes any nosier. Over 100 Kilometers driven no problems or noises
Appreciate 0
      06-13-2019, 08:41 PM   #10
DrivingPassion
Lieutenant
DrivingPassion's Avatar
United_States
129
Rep
485
Posts

Drives: '15 M235xi
Join Date: Nov 2006
Location: WA

iTrader: (0)

Quote:
Originally Posted by Pairadime View Post
I am happy to report, grinding these weights down don't seem to make the brakes any nosier. Over 100 Kilometers driven no problems or noises
Good to know. Thanks!
__________________
2015 M235i xDrive 8AT
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 06:19 AM.




2addicts
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