hi looking to get a set of the oem 19x9 wheels for my b7 avant . i like the ttrs version because it comes in all silver. the offset is 52 so i was thinking of a 15mm spacer for et of 37. the s5 rotor is 19x9 et 33 which may introduce rubbing. do both have the same concavity since they are both 9" wheels or does the offset also come into play?

i want the most concavity i can get.

thanks