run flat tyres on a freelander

Just a quick update on a previous post i did couple of days ago. Just back from having tyres fitted on rear and matched up with almost new sunny's on front. Only had the freelander since sunday and requested worn tyres on back were replaced ad part of deal.Just found out that the tyres are bridgestone er300 run flat tyres and was getting a drone and vibration.worried that vcu was wrecked but now that all same tyres have been fitted it seems to be a million times nicer to drive.my tyre dealer said rft should never have been fitted on the freelander rims.thanks for all the useful info on here about having matching tyres etc and damage that can be caused if you ignore it.luckily through this site i have hopefully avoided some big expenses,not what i'd want from a new car!.

Hi are they recommended to change all 4 tyres at same time? I have just got some cheap ones on front and kept original back ones. That have prob got another 80000 miles on them. What to do

I have just got some cheap ones on front and kept original back ones.

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Put the new ones on the back and I think 80000 miles might be a bit unrealistic.