[good hands]

Being a newbie to doing my own work i was wondering when do you know when you should change brake pads. I am currently running pagid orange on my 911 carrera with stock brakes. After the Glen i have about as much pad as the backing both front and rear. Also this is the second time my fronts and rears have worn about the same. I thought the fronts always went quicker. the car is now only driven on the track and to and from the track. thanks for the input.