I use Michelin 235 40 18 4S on my MK7 with Neuspeed RSe12 8"x18" and the grip is a tick better than the standard size. This combo is also lighter than the stock wheels and tires...and along with the suspension modifications, it's a difficult subject to try to quantify. I am always concerned with wheel and tire weight...that drives my decision making...if you like the look of a 19" rim, go for it. I think that you will find a larger variable between tire types and widths where ultimate grip is concerned...steering response is in theory better with a lower profile tire, but sidewall construction will also affect steering response with a similar tire size range.
Pros: better grip, lighter combo
Vehicle:
Volkswagen Golf
