New answers tagged hydraulic-disc-brake
Simply put a bigger rotor provided better braking, and a four pot caliper provides better braking - better meaning more, and more control (Everything else being equal). For the same force between the disc and pads, a bigger rotor generates more torque on the wheel - i.e. more stopping force. It is running though the pads faster, generating more friction ...
The larger rotor provides a larger braking surface. A 180mm rotor has more inches of rotor per revolution. The greater mass of the bigger rotor aids in dispersing heat . A single piston caliper pushes one pad against the rotor and deflects the rotor onto the other pad. The advantage of a two piston caliper over a single piston is that each pad is squeezed ...
I had the same problem when storing my bike. I used coins to keep the pads separated. It works pretty well: http://blog.nadnerb.co.uk/?p=46
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