Optimum tyre size for V70 II

Hello to all Volvo friends! It won’t be that long before you can think about summer bikes again. I wonder which tire size is the optimal one for my V70 D5 AWD. I fluctuate between 16 inches with 205 or 215 widths or 17 inches with 225. The 17 inch tire was described elsewhere as quite uncomfortable (is of course the more interesting variant), the chassis itself is also rather tight. I also ask myself, whether you can easily drive back home with the 16-inch reserverad (that’s what I did) with a trailer (we’re also travelling in Southern Europe – something like that happens there) too. 16 inches in 215 width should sometimes also be a problem, because the tyres may be scrubbing… What are the experiences? I already thank you for all your contributions.