We moved from the Touran to the Sharan. From the Touran we still have 2 years old Conti TS 830 P winter tires there. Because of the rim these do not fit on the Sharan. The Sharan (1 year old, 19,000km) we bought with the all-year tires ContiContact TS815. My KfZ workshop has now recommended me to leave the all-year tires on it in winter and to buy new summer tires for the summer. The all-year tires are newer and therefore at least as good as the Conti TS 830. He would advise me to sell the TS 830. Other alternative would be yes: to put on the Conti TS 830 suitable rim for the Sharan and to use it as winter tires, and to put up the TS815 in the summer. I know that the whole year-round tires are always a compromise. What I have read so far, the TS815 are also considered to be more of the winter than the summer tires. So after the recommendation of my workshop I would have the compromise in winter and not in summer. last winter wasn’t really wintery, the Sharan is only moved during the day and mostly in the city. I’m concerned above all about the safety, the Sharan carriages the whole family.