• Replaced all four run flats on my 320 with “go flats” earlier this week. Just did Glasgow to Wales and the difference was significant. Much less road noise and so much less harsh on country roads. Wish I’d done it sooner!

    Just need to figure out what I can get in the boot for emergency puncture fixings as a last resort.

  • I scrolled through a lot of threads on bimmerpost discussing this so I shall regurgitate some half remembered nonsense - ‘best’ solution reached was a really clunky oem space saver spare option (instructions - Strap carefully to lashing points against back of rear seats, just so). It does at least come in a branded bag so you have something to look at as you realise how little boot space remains. I think some 5 series space savers are also ‘right’ and maybe just about stowable somewhere sensible as long as you’ve not got an xdrive. Pump’n’gunk a superior option for maintaining practical car use imo.

  • Have you informed your insurance company, stupidly changing from run flats counts as a modification, so needs to be notified in most cases...

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