BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      06-15-2019, 05:57 PM   #1
Ladydragonz
Private First Class
Ladydragonz's Avatar
United_States
65
Rep
166
Posts

Drives: '08 135i M Sport
Join Date: May 2015
Location: Westchester

iTrader: (0)

Are Zimmerman Rotors directional?

Just finished putting on my rear rotors and I'm so confused if they are directional. Either way I put it one will be pointing towards the back of the car and one towards the front. Does anyone have any experience with this! Thanks
Attached Images
  
Appreciate 0
      06-16-2019, 09:41 AM   #2
tracer bullet
Lieutenant Colonel
tracer bullet's Avatar
United_States
645
Rep
1,796
Posts

Drives: '11 135i , '15 X3 35i
Join Date: May 2011
Location: Saint Paul, MN

iTrader: (1)

Quote:
Originally Posted by Ladydragonz View Post
one will be pointing towards the back of the car and one towards the front.
I think that answers your question, you don't have any options and don't order 1 left and 1 right.

It's a good question though and observant. Long ago on another forum I was a moderator on we had this question come up a few times, and in the end it didn't seem to matter about directions. Vendors said so when asked, and looking long enough for pictures of rotors set up on more expensive cars from the factory showed them going both directions as well.
Appreciate 0
      06-16-2019, 09:45 AM   #3
gjm120
Lieutenant Colonel
United_States
915
Rep
1,659
Posts

Drives: 2013 128i
Join Date: Jan 2016
Location: East Texas

iTrader: (0)

Quote:
Originally Posted by Ladydragonz View Post
Just finished putting on my rear rotors and I'm so confused if they are directional. Either way I put it one will be pointing towards the back of the car and one towards the front. Does anyone have any experience with this! Thanks
Rotors are directional if the vanes in the ventilation gap are angled a certain way. I have Stoptech directionals on the front of my car and it was clear which side was meant for what.
__________________
E82 / Ver Red / Blk Boston L / BMWP Springs w/ Koni Yellows / M front control arms / M rear guide rods / AT / Sport seats & steering wheel + paddles
Appreciate 0
      06-16-2019, 10:29 AM   #4
gjm120
Lieutenant Colonel
United_States
915
Rep
1,659
Posts

Drives: 2013 128i
Join Date: Jan 2016
Location: East Texas

iTrader: (0)

This video explains it pretty well.

__________________
E82 / Ver Red / Blk Boston L / BMWP Springs w/ Koni Yellows / M front control arms / M rear guide rods / AT / Sport seats & steering wheel + paddles
Appreciate 0
      06-16-2019, 10:31 AM   #5
Ladydragonz
Private First Class
Ladydragonz's Avatar
United_States
65
Rep
166
Posts

Drives: '08 135i M Sport
Join Date: May 2015
Location: Westchester

iTrader: (0)

Quote:
Originally Posted by gjm120 View Post
Quote:
Originally Posted by Ladydragonz View Post
Just finished putting on my rear rotors and I'm so confused if they are directional. Either way I put it one will be pointing towards the back of the car and one towards the front. Does anyone have any experience with this! Thanks
Rotors are directional if the vanes in the ventilation gap are angled a certain way. I have Stoptech directionals on the front of my car and it was clear which side was meant for what.
Quote:
Originally Posted by tracer bullet View Post
Quote:
Originally Posted by Ladydragonz View Post
one will be pointing towards the back of the car and one towards the front.
I think that answers your question, you don't have any options and don't order 1 left and 1 right.

It's a good question though and observant. Long ago on another forum I was a moderator on we had this question come up a few times, and in the end it didn't seem to matter about directions. Vendors said so when asked, and looking long enough for pictures of rotors set up on more expensive cars from the factory showed them going both directions as well.
Yea mine isn't clear and I don't think they are my last ones were so I was so confused. Guess everyone makes them different. Next brake job I do eventually will be stoptech
Appreciate 1
gjm120914.50

      06-21-2019, 05:18 PM   #6
135ivert
Lieutenant
27
Rep
449
Posts

Drives: '10 E88 135i, '13 E70 M-sport
Join Date: Mar 2013
Location: Colorado

iTrader: (0)

Quote:
Originally Posted by gjm120 View Post
Rotors are directional if the vanes in the ventilation gap are angled a certain way. I have Stoptech directionals on the front of my car and it was clear which side was meant for what.
I think the StopTech were even different part numbers IIRC.
Appreciate 0
      06-21-2019, 07:22 PM   #7
gjm120
Lieutenant Colonel
United_States
915
Rep
1,659
Posts

Drives: 2013 128i
Join Date: Jan 2016
Location: East Texas

iTrader: (0)

Quote:
Originally Posted by 135ivert View Post
I think the StopTech were even different part numbers IIRC.
That's right. There is suffix L and R on the numbers of the ones I ordered.
__________________
E82 / Ver Red / Blk Boston L / BMWP Springs w/ Koni Yellows / M front control arms / M rear guide rods / AT / Sport seats & steering wheel + paddles
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 11:34 AM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, 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