Does your rear rotor look like this?

[JuRuKi]

Driver rear rotor:

It looks like the brake pad is only making contact with half of the rotor. Thoughts?

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[NoVaGT]

Better picture? Something not taken with iPotatophone?

 

[PatrickGT]

In terms of what, exactly?

It does look like a roughly round metal thing... but... what's the specific question here? The uneven scuffing, the perpendicular lines...?

 

[wildcatgoal]

How many miles are on the car?

 

[NoVaGT]

Keep in mind, the stupid electronic nannies work on the rear brakes. They do tend to see some extra wear.

 

[JuRuKi]

Sorry for the crappy pic. Im referring to the inner ring of the rotor. It looks like its the only part making contact with the pad.
Car only has 7k miles.

 

[wildcatgoal]

Take the wheel off and inspect the caliper and pad, grease and re-install. Could have a dragging parking brake but this could be nothing to worry about. I tend to see weird rotor wear when pads are not bedded right.

 

[NoVaGT]

Oh....the OP has messed with the brakes. I don't know about the S550 rear calipers, the S197 rear calipers had to have the pistons wound in to a very specific point to work properly. Some points cast into the calipers and stamped into the pistons had to be lined up correctly.

Maybe something is amiss with the OP's rear brakes.

 

[jasonstang]

Seems odd. My rotors never get dark what you have on the outter ring of it.

 

[Boostnonu]

I would check the width of the pad. Not all pads cover the entire surface area of the rotor

 

[BMR Tech]

2015 GT PP Track car with Carbotech pads, 11K miles

2015 GT PP Daily Driver / Test car, 17K miles

2016 GT PP Daily Driver, Peat the piss out of, 15K miles in 5 months

 

[melwff]

if you run your finger from the center to the outside of the rotor do you feel a ridge where the pattern changes?

 

[JuRuKi]

I do feel the difference with my finger. big change in feel between the inner and outer ring.

 

[texasboy21]

Bed your pads, and take the wheel off and inspect. It looks like you are not getting full pad contact on your rotor.

 

[JuRuKi]

Bed pads as in make consecutive hard stops?

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