At the end of my track day my front pads (XP10) were not near the same thickness. I have 2 front pads with 0.5625" thickness (includes backing plate)
and 2 front pads with 0.46875" thickness. Unfortunately, I don't know where they were. It could be that the 2 thinner pads were both on the inside of the rotors.
These were new pads.

What do you think? My car is stock with the rotor splash guards still in place.

 

I had the same issue, I think it has to do with the fact the piston is on the inside and it seems to wear more. I also had more wear on the leading edge of the pads. So next time you go to the track try putting the thicker pads on the inside.



I have gone to a big brake kit and still get more wear on the inner pads.



Your results may vary.

 

Thanks for the reply. I may have to clean and grease my caliper pins. I am going to take them down and inspect them. I may also remove one of the pistons and see if there is a problem there. I have new piston seals for both front pistons if I need to do both. I will let you know what I find.

Thanks,

Jim

 

Totally normal on a single piston brake caliper. Fun starts when you get a squishy pedal due to the uneven wear.

 

I am getting soft pedal. I was running 30 minute sessions. After 20 minutes each session, I started to get soft pedal. I had never had this happen before so I suspected that there is a problem. When I removed my track pads, I noticed the uneven wear.

 

You should be able to tell which pad was inside and outside by looking for a circular piston mark on the backing plate. Since the leading edge will always wear more then the trailing edge you can figure out where each pad went. If the driver side wears different then the passenger side you may have binding brakes (either the slider pins or the piston).

 

I took them out to look. The pads with piston imprint are thicker. My outer pads are wearing more ! In my mind, that can only be the pins. Do you agree?

BTW, do your piston boots come apart when you track your car? Mine do.

 

I have had that before also. Its time for new or rebuild brake calipers. The alignment tab on the caliper puck, if you call it, that wears and shifts under the break pad causing it to put uneven pressure on the pad.

 

Sticky pins could cause outboard pad wear. While you can regrease the pins, I agree that it's beneficial to take the extra step and rebuild the calipers. Not difficult (though putting the new piston boot on takes patience), and you can be sure you're addressing any caliper sticking issues.

This year I haven't had issues with the piston boots disintegrating. I installed brake ducts last year and put a new boot on this winter part of the rebuild). One Infineon day to finish off some Carbotech XP12/10 pads, then a Miller Motorsports Park and a Laguna Seca day on my new Cobalt XR2/4s and no crunchy boots, so hopefully the issues is solved. Note I'm delighted with the low wear rate of the Cobalts vs. the Carbotechs, and fade resistance is as good if not better.