The aftermarket wheels thread could help you to determine if you can lower it. There are plenty who have lowered on 245s, at least one that I know that is on 255s but thats really at the edge of fitment. Depends on your offset. Do you know the offset/size of the Audi wheels?
I'm lowered w/ 235/45/17 tires on 17x8.5 wheels w/ a +42 offset. Probably could have gotten away with +35 and still would've worked.
I'm trying to find a set of wheels, tires, and springs for my wife's GSW I'd love to see what other VWvortex members are running to help me figure out what is a good offset and width is for this car that is as wide and flush as possible without rubbing or compromising the ride. I don't know if...