It is all about creating hydraulic pressure. I believe a larger bore would actually mean lower pressure for a given amount of pedal pressure. And my experience with trying to stop various vehicles after they have run out of vacuum is that the larger vehicles with the larger MCs take much more leg power to muscle them to a stop.
I wonder if having ABS necessitates power assisted brakes? I suspect it probably does.
Would like to have an older small car with slightly oversized manual disc brakes all around. I would think that such a system would stop just fine with little effort and would likely provide better brake feel.
Motorcycles stop just fine with manual brakes. Yes, they are much lighter than a car, but, you are using just a few fingers for all the force you need. Your right leg can easily produce 10X the force
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