Hammer wrote: Either I get a 215/40/16 or a 205/50/16. The latter being smaller diameter than stock and the former slightly higher and loosing the lower profile stance.
I think you'll find it's the other way around.
215*0.40 = 86
205*0.50 = 102.5
205*0.45 = 92.25
Hammer wrote:but when they got upto 60km/h (still driving in circles), the OEM fitted Audi understeered widely.
Good demo on how effective they where IMO.
did they show you tyre pressures and wheel alignments too