C5II excessive tyre wear rear

[olavballe]

Hi. My C5 2007 has suddenly very excessive tyre wear on rear outside. More right than left side.
Bearings - both wheel and suspension - was Exchange 50,000 km ago - No noise - suspension feels normal.
Camper looks fine.
I did not measure toe in - but looks like rear wheels has toe-in.
I have not been in any accident.
What to look for?

[PaulC5]

It might not be the rear brakes but you can get corrosion between the rear calipers and suspension arm that pushes the caliper out and it can get that bad the caliper can catch the wheel. On our C5 every 2 years I unbolt the calipers and apply copper grease on the contact area to prevent this happening.

[olavballe]

Thanks for this input.
Actually, last time i did change the rear brake disks, (20.000 km ago) i realized exactly the situation you descibe.
When mounting the calliper, i could not Mount new brake pads and a new disk.
I managed with a hammer to remove corrosion on the rear of the calliper, and could reassemble.
New service point - Copper grease on rear of calliper. Not mentioned in Citroën service manual.
But i Think my tyre wear is something Else.