Bought falken at3ws 08 July 21. Got told last week to replace rear right tire as it could not be balanced.

Should I replace just the 1 tire or both rears? rear 4 tires right now have around 2500km (1553 miles) on them

 

If I had one with that few miles on it that could not be balanced, I would not buy a new one. I would insist on a free replacement..

 

The dealership has agreed to replace it (after a lengthy back and forth). Should I just get the one replaced or both rears?

 

I would just do the one tire.

 

Just one

 

Not enough miles to cause any problems.
If 4x4 and mismatched sizes it can hinder the 4x4 shift engagement but at 1,000 miles that is still like new, about 1/60th used if you get 60,000 miles out of it.

 

Ah ok, I'll hopefully be getting it on this week. I'll just ask for the one.