But if the pistons are massive, it might need the larger id to allow proper braking.
No thanks. Grimeca can rebrand all they want. I'm not paying $800 for brakes when there are alternatives that are proven and cost $300. They're just using the Brembo name to try and sell some new brakes and people will buy them, as evidenced by the people in this thread that associate Brembo bike brakes immediately with the motorcycle and vehicle brakes. It's a known company, so that's why they do it. I can show you a Brembo oem rotor that separated from the hub portion. For the older German vehicles, it's known to not use Brembo because of the high rate of defects, short life, etc. In fact, I saw one several years ago where the braking surface actually peeled away from itself.
I also love the rationale for defending the use of conventional bolts, but it also displays Brembo's lack of understand of what riders would want. Something like 100% of us carry around hex tools and few carry sockets and wrenches. I could understand if they went TorX or soemthing, but with conventional bolts? Stainless is flexier than conventional steels, yes, but it has proven itself over and over again as the material of choice in mtb. Not only does it provide adequate strength, but corrosion and other problems are reduced. Don't like pulling threads out of a casting, personally. The mtb environment is not the same as an F1 car, but why won't they speak of oem Brembo brakes that come on many family to performance cars? Oh right, that won't sell these brakes.
They just don't get it.