Wrong answer, all pads need to to bedded in espically if you are not changing rotors and even with new rotors. You need to transfer some material from the pads to the rotors to get the pads to "grip" the rotors, With AEM and or auto-zone type pads I generally do a few 50 to 20 stops, and then drive around to let them cool. If I am using Carbotech , cobalt or hawk pads I follow the break in procedures they include with thier pads.