Quote:
Originally Posted by boondoggle
Seems odd to me they would put larger rotors on but, from what I understand, the pads are the same size as other models. So, my pea brain tends to think I'm getting the same amount of friction when the brakes are on. It's still a two piston caliper from what I've read.
Other than perhaps better heat dissipation due to more mass and larger surface area, I don't really see the point. I'm not a mechanical engineer though so maybe I'm missing something.
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This point seems to come up every time there is a discussion on rotor size. I can see your rationale in the thought, but it's because braking is a function of torque arm, or "moment" if you will, not just a straight force and friction calculation.
So the further you get away from the hub (bigger rotor), the more force you are able to apply. Good analogies would be: the arm on your breaker bar, trying to push a door shut with 1 finger close to the hinge vs close the handle, or trying to stop a spinning fan blade at the hub vs at the blade tip.
If it were just a linear force calculation, all rotor surfaces could essentially be sized just big enough to accommodate your pad size (barring the whole heat dissipation thing).
Hope that makes sense.
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