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09-06-2004, 09:50 AM
I've found little tears by the holes of my front Zimmerman brake disc. I had only one track session this year.
Is it normal? Should I be worry about it?

d reeves
09-06-2004, 09:57 AM
and they'll only get worse. I'd replace them before going to the track again. I used them when I started tracking my 325is, and they cracked all the way through at WGI. Fortunately I noticed between sessions, but had to replace the rotors to get home.

Having a rotor crack and fail at speed can be disastrous.

09-09-2004, 02:15 AM
Thanks for the input!
Yesterday I have noticed that I have two half front right brake disc :(
I bought it one year ago, and I had only a few lap on our track at the middle of the summer.
Poor quality? Should I use BMW discs for trackdays and daily driving?

d reeves
09-09-2004, 07:23 AM
the stock balo rotors are really good.

The zimmermans look cool, but are terrible at resisting heat buildup.

:: Mick ::
09-09-2004, 10:05 AM
Get OEM replacement (Balo) rotors and good pads. Then install brake cooling ducts and you'll be good to go.

09-11-2004, 08:22 PM

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