I recieved two front brembo blanks for my 4th gen and one has two dimples on the rotor while the other doesn't. Are both rotors supposed to have these dimples? Also one rotor has brembo stamped on it and the other doesn't. Should both have brembo stamped on them?

 

One is Brembo. The other isn't.

 

Yeah, those should definitely not be there...

 

 

I'm going to RMA the dimpled one. Autobarn sucks.

 

The dimples are wear indicators. When they're worn smooth, the rotor is done.

 

WTF - what ever happened to having the minimum thickness stamped on the outside of the rotor???

 

ive got demples on my brembo rotors... i thought they were just wear indicators also....

 

None of the 4 Brembos on my Max have them, but they are slotted so that may be the reason...

I just think its kind of retarded to put dimples in the friction surface of a rotor when most every other rotor on the planet has minimum rotor thickness stamped on the outer edge. If you have the equipment to turn rotors, you have the equipment to measure their thickness and tell they shouldn't be turned...

 

What confuses me is why the rotor with dimples has no brembo stampings on the side while the rotor with out the dimples does have brembo stamped on it.

 

I called brembo at 17347375823 and I was told that the "easy check" rotors have "notches" so that you can check when the rotor is worn out. This is the stupidest thing I have ever heard. That's what micrometers are for. I was also told that depending on where the rotors are made they may or may not be stamped with brembo on the side. I hope these are better than the cheap rotors at parts stores because it doesn't sound like it. Can't wait till next week to put it all on. Thanks everyone for your help.

 

The dimples may be there in order to assess rotor thickness without having to pull the wheels. Not for determining how much you might still be able to cut. That would benefit periodic state inspections and could also keep individuals from being sold rotors unnecessarily.


Norm

 

Yes. The dimples help the 'average Joe mechanic' keep his own car up and running vs. having to pull the rotor off and take it to a shop or parts store to check the rotor thickness.

MOST people do not have a way to properly tell rotor thickness.
It's easy enough to remove our rotors to check, but some others (Honda, early Z, Chevy, etc) are a royal PITA to remove because they're integrated with the wheel hub and can't be easily removed from the car to check.

The dimples are a really good idea actually.

And yes, the slots in most aftermarket rotors are usually about the same depth as the rotor's minimum thickness. when they wear the slots off, it's time for new rotors.

 

they are prob both brembo.. you got one old product and one of their newer products in tersm of shelf life..... i would still bring them back and want 2 of the same for peace of mind..

 

Every Brembo disc I've ever bought has had brembo engraved along the outer edge.

 

When I called I was told not all of them have it depending on where they were made. Seems kind of cheap not to have it on there for a company like brembo. Makes it seem like a made in china product.