Thanks for the very detailed response HighlandPete!
The car has not been lowered as far as I am aware. I am its second owner, and the previous was company car.
My measurement was very crude. Just a ruler held up to the gap between Tyre and Arch.
So would you recommend going with new tyres and then a full 4-wheel alignment just to be sure?
Lastly, looking at this site: http://www.tyrereviews.co.uk/Tyres_For/BMW/3-series.htm
It appears that Dunlop SportMaxx RT or Michilen Pilot Sport 2 are the best tyres to go for?
I cant fine the Pilot Sport 2 on Black Circles, but the Pilot Sport 3. Assume this is its successor?
Hoping to get tyres changed this weekend.
Anybody got any firm recommendations? (I know this topic has been trampled to death.)