This is the Skoda wheels brochure https://www.skoda-auto.com/_doc/6d5c59b3-5d97-451a-ab78-2ef185e6e373 There is also a Skoda UK winter wheels (with tyres) brochure https://www.skoda.co.uk/_doc/d1040b95-40f0-431a-95ed-d531f289c13f As you will see, lots of different sizes for a Karoq. The 17 inch wheel with deeper sidewall will be less harsh over rough tarmac than bigger 18 or 19. However there are two things you need to be aware of, temperature and basic physics. Everyone knows rubber gets hard in cold weather, and harder is stiffer (less soft and probably more rumble). Modern tyres have all sorts of things in their compounds eg silica to try and balance grip with a long wearing life (and budget tyres have simpler compounds, so often don't wear or grip as well, because they are built down to a price). Generally all season tyres are softer at typical UK temperatures, than summer biased compounds (and if you want comfort avoid anything with sport or eco in its name as they tend to be even firmer). So if don't want to change the alloys (and you could be paying good part of £1000 to get set of 4 new), then look for premium all season tyres. Note some brands have two load ratings, and for comfort don't buy higher load ratings if you have a choice as sidewall is stiffer. There is nothing wrong with Bridgestone as a brand, but the turanza eco is an inappropriate choice if comfort is your first priority.