Originally Posted by velociabstract
Porterfield R4S is a street-racing pad. So far I haven't noticed any unusual wear on the rotors. A strictly racing pad will wear the rotors. I have no idea how a racing pad can eat through a rim. I assume they meant the rotors. As far as a tune, I can't give an opinion yet. I don't have a tune myself but am aware of the need for one with the mods I have.
Les
i think he talking about the brake dust getting wet and dripping on the rims. not sure what compound that would be