Wheel options and ET values

[GordonA3]

Hi folks, i have a 2010 A3 Cabriolet with standard Audi 17 inch wheels on it (Blue car attached). I would like to change the wheels out for what i think are Audi Le Mans wheels shown on the white car.

My question is that going by the hand book, my wheels / tyres are: 245/45R17  7.5Jx17  ET56  PCD 5 x 112 

It looks like the Le Mans wheels as an option when the car was new were:  225/40R18  7.5Jx18  ET54  PCD 5 x 112

I am finding it difficult to get second hand wheels from an A3 with an ET value of 54 but they seem easier to come by if they come off an A4 where the RT value looks to vary from about 32 up to 42.

So my question is, what Le Mans wheel sizes can i fit?

Thanks

Gordon

[Steve Q]

Sure this style of wheel was fitted as standard on s line models. 

So that's what I'd be looking for in a search criteria as youll find the a6 c6 let man's was fitted with this style of wheel which were different in size. 

Cheers

Steve