Hi All, just bought a A3 2L Tdi sport, only 67K from new , year 2006, as standard it has 17 inch alloys, 225-45-r17 tyres, they are very noisey especially at rear, been reading up and seems quite common to get a lot of tyre hum noise, never experienced this in other cars in the past, some sites recommend fitting 16 inch alloys/tyres, which should make quieter running, what are everyone's thoughts on this, thanks Weldon.