Hi everyone, this is my first post on the forum,just wanted to know if anyone has fitted 20" alloys on there A4 cab? any photo's would be great. also do they bolt straight on, or would arch work need to be done. I am referring to the Audi A8 cantona's which come in the size 5 x 112 20" by 8.5J ET45 What tyres size would I need to use. Any help will be appreciated.