My apologies if this is an item that has been posted before but as a new VW owner and forum rookie I hope someone can help. I have a 2024 T6.1 4Motion T32 and would like to upgrade to other wheels than the standard 17". What size wheels and tyres would be usable (I need to tow a caravan around Europe) and what changes should I make to fit larger wheels and tyres (it seems many people have suspension changes - why?). I have been looking at 20" but unsure if 19" is better and as to wheel width I should buy, and what tyres are compatible (I have seen used wheels for sale but usually with 275 but when I look at many vans they seem to use 265 or 255 rather than 275?