Hi,
Thanks for the replies.
I have already replaced the front 2 tyres with a matching pair as they were worn most.
I am still running the back 2 as they have quite a bit of tread on them. I will replace them in a couple of months and keep the standard rims.
My original idea was to run 18" all around putting 255/40/18 tyres on that would more or less keep the ride height the same as 255/35/19 standards.
I dont like the idea of no spare wheel and I believe a audi space saver spare would fit any wheel if I went to 18".
But I never thought about the insurance. Good point.
Back to the drawing board.
Thanks again.