Hi all, So I’ve just had my 13 plate black edition roadsters first major service at Audi price matched to £323.95 including brake fluid and pollen filter (seemed an okay price?) Anyway they’ve flagged that my front brake pads and discs are low and need replacing which I declined from them due to the cost at £271.40 ex labour. I’ve found Brembo parts which I’ve been told are a great brand at a much lower price and have a mechanic friend to fit them. Before I order the parts though it seems there are different sizes and the onus is on me to know what’s what. I haven’t got a clue, do I need to get a tape measure out and remove the wheel to find out? I don’t want to order the wrong ones and waste a journey and hassle of a refund! Never had this with parts on my old cars. Just stuck in the reg and away I went! Any tips?