Michelin does Cross Climates in 225/45 R 17 94 W XL and in my experience over 10,000 miles these are the best all weather tyres. However, they are not runflats, and they are directional so tyre swaps to even out wear have to be front to back the same side. You can run the car on non runflats, but you would then either need to rely on the AA that carries universal space saver spare wheels to get you to a tyre depot, or carry a space saver spare. Tyre repair kit glop fails to repair around 95% of punctures.