Disc brake rotor size
I just noticed that Avid's mechanical disc brakes come with 160, 185
or 203 mm rotors. It's claimed that the 185mm rotor has 15% more
"power", the 203 26% more.
Does a larger rotor really provide more stopping power? Why? I could
understand less fade due to heat, since a larger rotor would dissipate
heat better. Does that translate into more "power"?
I assume that dimension is the rotor diameter. But wouldn't a change
in rotor diameter change where the caliper gets positioned, i.e. would
require a change to the caliper mounting eyelets?
I'm spec'ing these brakes for a road bike; should I expect to need
more stopping power than a mountain bike for say long mountain
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