P38. Odd rear brake disc wear.

pwood999 said:

Sliders could be too free?

Are pads correct way up ? Depends on make but some are different inside & outside the disc.

https://www.ferodo.co.uk/blog/directional-brake-pads.html

Or
https://www.delphiautoparts.com/gbr/en/resource-center/fitting-directional-brake-pads-right-way

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pwood999 said:

But do 2 of the 4 have the C shape cutout in the metal backplate?

It changes the pad to disc angle to reduce wear & squeal.

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pwood999 said:

Is there any wobble on the sliders ? Or perhaps they are bent ?

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allanw said:

Hi all. I wondered if anyone has seen an odd wear pattern on rear discs where the pads are only acting on the outer half inch surface of the disc? They are new discs and pads. Pistons and sliders are free. It's like the discs are thicker on the outside edge than the rest of the friction surface? I have never seen this before.

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