I bought some 18 inch A4 rims to run on my golf R last winter, the centre bore was bigger but I got round that with Spigot rings, offset (47) was fine, they are 18 x 8 instead of 18 x 7.5 but the tyres are still 225 / 40 /18 just with a little stretch. I'm planning or using them on the S3 this year.