The wheel specs are as follows.
ADV10 Track spec SL Series
Matt black face with Gloss black outer lips
Hidden hardware
21x10 front
21x10 rear (deeper concave)
We advised the client to use a 10j rear, which allows for better drive-ability and also does not let the stock 285/30r21 tyres stretch on that rim. The lower offset rear wheels allows us to build a deep concave rear wheel without going wider which we believe is better on an all wheel drive Audi.
Any questions then please feel free.
Enjoy!