the difference on speed and control between the 18s and 17s will be minimal i doubt that you'll be able to notice it. yet the difference visually between the 18s and 17s is massive in my opinion - the 18s are a must have!!
As a normal road user I doubt you'd notice the difference between the 17s and 18s. I've changed the 17s on both my mk5s to 18s (for looks!!!) and the ride is much the same. The roads in the UK are so bad you could have 15s on there and still need regular dentist work where your fillings have rattled loose.
The 18s look better full stop. 19s would look even better again
oooow... thanks for the responses... hmmm I had asked the dealer about it too before i made the order. He said most people would opt for the 18s as they offer more control and allows the car to be more stable at higher speeds. I said I would prefer to have the 17s and he replied, thats why it was good I chose the car with the ACC for comfort... From what you are telling me the 17s are the best sized rims... as it offers both speed and control... sob sob sob
If the 18s are only for looks... sigh... too late...
HM
I can't find the EVO test now online, it was about 2007 using a Golf GTI (same basic chassis as mk6) where they tested a load of tyres against each other on 18'' rims, then chucked on a set of 17s to see the difference and it was about 1.5 seconds around the track quicker.
Don't listen to dealers too much as they tend to talk sh!te. The salesman who took me out in a mk6 GTI told me the car had more torque than my mk5 as it had a supercharger as well as a turbo. Yeah okay.
Once again, the 18s look better!