Originally Posted by Scarebird
It is pressure from marketing; the kids like to see the holes. I asked Brembo about this at SEMA, as they wrote the book (literally) about disc brake design. If you have solid rotors, it is not an issue as you can countersink the holes and remove the risers.
I always thought Girlock suplied the first commercial discs in the 50s. I'm guessing that Brembo market their products very well, just as mazda are famous for the rotary - an NSU (wankel) design.
I may still have a steel girlock disc off a mid 70s sports sedan Monaro in the shed. Like most of the running gear on this car it is alledged to be ex Le Mans GT40. It has holes drilled and heat cracks. Funny how people want 'high tech' but will accept BAD 'old tech' as long as it doesn't work and looks trick.