Just registered and thought I'd try out the forum for a burning question! Not long purchased an A3 Black edition (60 plate) and think it's a cracking car. Only downside is the slightly hard ride, and part of this is probably down to the low profile of the tyres (225/40-R18).
It seems that just increasing the tyre profile increases the air volume in the tyre and could have a significant impact on comfort. So my question: is there physically enough space on a standard issue A3 black edition to take a 225/45 R18 tyre vs the standard issue 225/40-R18? I'm not looking to make any modifications to the car or change the rims, just the tyres.
It seems there'll be an increase in the circumference of approx 3.5% from this calculator (TRC Calculator)
Any experience appreciated!