Tyre Comparison

[snapdragon]

Assuming they are original wheels, type the reg. no. (or manually enter size) into :
https://www.audi.co.uk/owners-area/s...udi-tyres.html
and see what Audi recommend in terms of both tyre and load/speed rating.
At least you then know what are Audi-spec.
Check tyreleader's prices if you haven't already - they were cheapest for me a few meeks ago.