Recently I replaced my front and rear pads on my 14BS. They were the originals as far as I can tell - the car has 26k miles and they had the original sensors. The front pads were worn down to the point of replacement - I would say about 10-20% material left. The rears were about half so I could have left them. I opted to replace them because of an upcoming track day. I don't have an exact rotor thickness gauge (probably cost me $2) so my measurement was suspect. The front rotors measured around 28 mm but they had quite an established lip - probably 1-2 mm and that is certainly beyond the recommended wear point. The rear rotors measured about 20 mm but did not have the lip nor did they show much material loss. I chose to run the track day as is and everything worked out fine.
In preparation for the track day, I had Porsche flush the brake fluid. I also asked them to check the rotor thickness to confirm my measurements. They stated each rotor was 10 mm and that the front had a pronounced lip. The service manager noted that I had replaced the pads and stated that normally they would have replaced the rotors as well. I had assumed they meant that if the pads needed to be replaced, then the rotors were suspect and should be replaced as well. This makes sense to me for the front rotors which needed to be replaced but not for the rear. But I didn't get a chance to ask them to explain the 10 mm measurement. So now I am little confused. What could they have meant by the 10 mm measurement? I bought a more priced caliper measuring tool and I measured the new rear rotors - I don't understand what they measure as 10 mm.
The reason I ask is that I bought all the rotors expecting to replace them this coming weekend but now I am thinking I should hold off on the rear rotors. Hoping more informed minds can set me straight or confirm my suspicion. Thanks in advance.
In preparation for the track day, I had Porsche flush the brake fluid. I also asked them to check the rotor thickness to confirm my measurements. They stated each rotor was 10 mm and that the front had a pronounced lip. The service manager noted that I had replaced the pads and stated that normally they would have replaced the rotors as well. I had assumed they meant that if the pads needed to be replaced, then the rotors were suspect and should be replaced as well. This makes sense to me for the front rotors which needed to be replaced but not for the rear. But I didn't get a chance to ask them to explain the 10 mm measurement. So now I am little confused. What could they have meant by the 10 mm measurement? I bought a more priced caliper measuring tool and I measured the new rear rotors - I don't understand what they measure as 10 mm.
The reason I ask is that I bought all the rotors expecting to replace them this coming weekend but now I am thinking I should hold off on the rear rotors. Hoping more informed minds can set me straight or confirm my suspicion. Thanks in advance.