It has little to do with engine braking. Everything to do with grip. Tldr: Front slows you down with large bursts of power, rear keeps your speed in check with longer duration braking events. Don't need data acquisition to try going 20km/h on just about any surface,then using each brake individually and see how fast can you stop. Or ride down in'n'out burger with front only vs rear only. Pretty sure only one of those options is viable. I imagine the reasoning behind big rotor in the back is heat dissipation, as you'll do a lot more braking in the...