I have ask this question several times when I'm buying brake pads and rotors. It's the question of which brake pads work with which types of steel? Do organic pads work well with stainless rotors? Do bi-metal pads work better with cast steel rotors? Do some pad materials when used with certain rotor materials cause squeeling? All the pad manufacturers claim their pads stop quicker with less fade and blah, blah. I've heard that using the wrong type pads will actually hurt braking performance. Can anyone give me some stright answers. I usuall go with what has worked for me in the past and that is HD parts, but I would really like to use the pads and rotors that will stop the bike best. Thanks