Brake Rotors

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Originally Posted by eddomak

It's a bit soon to tell, I've only had them on for 1 week and they are still bedding in. Hope to update the thread in a couple of week's time. No brake dust yet through. No squealing either, but it's early days.

I can say for certain that when I swapped to new DBA rotors with the original (worn) brake pads there was an instant improvement in the bite, so I am hoping that will be the case with the new pads later on.

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In the past I would always fit new pads if I fitted new rotors but that maybe just an old way of thinking for the way old brakes wore.

I think the theory behind it was that as rotors lasted multiple sets of pads, and the pads were the cheaper item. The new pads would wear the high points on an uneven disc. If the disc was replaced, you would want to maintain an even surface as long as possible and it wasn't good to fit uneven pads to new rotors.

Now days with rotors and pads wearing as quick as one another that might be obsolete thinking.

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Originally Posted by joel0407

In the past I would always fit new pads if I fitted new rotors but that maybe just an old way of thinking for the way old brakes wore.

I think the theory behind it was that as rotors lasted multiple sets of pads, and the pads were the cheaper item. The new pads would wear the high points on an uneven disc. If the disc was replaced, you would want to maintain an even surface as long as possible and it wasn't good to fit uneven pads to new rotors.

Now days with rotors wearing rotors and pads wearing as quick as one another that might be obsolete thinking.

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UP FRONT DISCLAIMER: I am as in the dark as most people, so can't speak with any known, proveable authority at all. Happy to be politely and helpfully corrected. :)

I was going to replace get both new pads and new rotors fitted at the same time, as I have always had in the past, but due to some parts availability issues, fit the new discs 2 weeks or so before the new pads (and paid for labour twice. :( ) I, too, thought this would be good for them to bed in to each other.

However one of my knowledgeable and experienced performance car driving friends said that they tend to bed one thing in at a time - so that it is always a rough surface against the smooth surface, which would reduce the risk of glazing.

From my commoner's point of view (see disclaimer above) this seemed to make sense so long as it was a short while. But then again there are plenty of things that might seem to make sense, but actually are not the best thing to do. Oh well, I am sure I won't actually ever know the difference.

RDA and DBA rotors are very different in regard to centre webbing design..

DBA are still making some blanks in Aus, RDA is complete import and then machined in AU.