Hi I am in the process of buying a brand new TT Coupe factory order for a 1.8tfsi sport and the only option at point of order is for 18" alloy wheels which i understand are 18" * 8.5j offset 50, fitted with 245/ 40/ 18 tyres. However in the future I would like to upgrade to the 19" wheels that are available on the S line and Black edition models which are fitted with 19" *9j ET52 fitted with 245/35/19tyres. I have been unable to gain any advice from Audi so wondering if anyone knows the answer because from what i understand (apart from slightly margin in difference on wheel arches with the sline boykit) the sport and sline, without the lowered S line suspension are effectively the same car.