Unfortunately, it is likely to be the beam failing I'd imagine. How many miles does the car have?
Bear in mind most 306's are around 20 years old now (give or take).
This pic is the rear beam on a Rallye I picked up maybe 4 years ago when the car was approx 16 years old.
![[Image: received-10153298631167753-zpsmxlwa0o5.jpg]](https://i.ibb.co/dBVZx6p/received-10153298631167753-zpsmxlwa0o5.jpg)
So much camber it had worn through the arch liner and was rubbing on the inner arch of the car. Start by having a good look at your wheel in the side where uneven wear is occuring. See if you can see any camber in the wheel like this (I doubt it would be as severe as this). Jack it up and grab the wheel and give it a wiggle and see if you can feel any play in the trailing arm. If you've either, or both, it's likely your beam needs a bit of love..
Bear in mind most 306's are around 20 years old now (give or take).
This pic is the rear beam on a Rallye I picked up maybe 4 years ago when the car was approx 16 years old.
So much camber it had worn through the arch liner and was rubbing on the inner arch of the car. Start by having a good look at your wheel in the side where uneven wear is occuring. See if you can see any camber in the wheel like this (I doubt it would be as severe as this). Jack it up and grab the wheel and give it a wiggle and see if you can feel any play in the trailing arm. If you've either, or both, it's likely your beam needs a bit of love..
Cherry Red Rallye - Full on OEM resto.....