Hey everyone, I've posted a similar thread on G35driver but im not getting much input there so I thought I'd also post here for your thoughts.

28000 miles ago I installed R1concepts Eline BREMBO drilled and slotted rotors on all 4 corners paired with PBR Deluxe pads in the front and Posi-Quiet semi-metallic pads in the rear.

Recently, I began hearing grinding noises coming from the front brakes, so I took off the front rotors to inspect and this is what I saw. The inside pad on both the front brakes were completely toast, to the point where the passenger side pad had completely disintegrated and now there was metal on metal contact on the rotor. However, the outside pad on both front brakes still had plenty of life left. I guess I didnt notice to problem earlier because the noise tab is on the outside pad rather than the inside pad. Here are some pics of the front rotor and pads:





In comparison, the rear Posi-Quiet pads had even ware and both the rear pads and rotors had plenty of life left. Here are some pics of the rear rotor and pads:




Now, my main question is whether such uneven ware between inside and outside pads is common or whether there is a problem with the front calipers' pistons. I was thinking that there might be a problem with the calipers but then again I was able to push the pistons back into the caliper with my hands without too too much effort, so there wasnt any real seizing. Also, I thought this is just common because what is the chance that the inside pistons on both front calipers would go bad at the same time.

I also hope PBR and R1concepts with see this post and address some of the issues with their products. The PBR pads were complete garbage while the rotors did nothing to vent brake dust away. As can be seen in the pics, many of the drill holes and slots were filled with compressed brake dust.

Update:

After I originally posted this thread I was contacted by R1 Concepts to address the issue. Although my rotors were 3 years / 25k old, R1 Concepts took the extra step in customer service to ship me a complimentary set of new rotors. This is by far the best customer service I have gotten from a parts company so far. The superb customer service at R1 Concepts means I will be recommending them again in the future.

 

Similar problem happened to me a few weeks ago. It was because the pad guide clips on one of my calipers fell out and the pad wasn't in the right position. So ate through one area of the pad really fast and then metal to metal on the rotor and left me with the same problem.

 

but the problem of inner pad wear is happening to both front calipers. Though it might be possible that both guide clips were out of place.

 

I'd check for the clips. It's actually not a bad idea to replace them after so long. I got 1 whole set (1 caliper) for around 11 bucks through O'reillys.

Here is what mine looked like

 

yep, i guess I can order an entire new Brembo hardware kit off rockauto for cheap.


Any other thoughts on what might be causing the prob? Im mostly guessing it's just normal heat wear on bad pads. I just dont want to rebuild the calipers (since they dont seem to be seized) but I know Ill prob end up doing so.

 

Update:

After I originally posted this thread I was contacted by R1 Concepts to address the issue. Although my rotors were 3 years / 25k old, R1 Concepts took the extra step in customer service to ship me a complimentary set of new rotors. This is by far the best customer service I have gotten from a parts company so far. The superb customer service at R1 Concepts means I will be recommending them again in the future.

 

Thats awesome. Good vendors