The Tiguan R is powered by the updated ... the damping starts to lose its polish. The big 21-inch wheels and tyres feel oversized and heavy, removing some of the agility in the chassis.
So, in some cases, going to a smaller wheel but a tyre with a higher profile (deeper sidewall) can be a good move. What will limit this will be the brakes on your Tiguan. Fundamentally, you need to ...