When tires first were on sale, there were no reviews for them on the Kia Optima automobile, so I bought some. Korea production. If you operate a car in cities where snow is promptly removed from the roads, sprayed with chemicals, be prepared for noise. For those who are contemplating taking it, it is worthwhile to take into consideration the fact that these tires have an increased number of spikes. Rubber on pavement makes a lot of noise; at modest speeds, it buzzes, and as speed increases, the buzz develops into a scream. Regarding rolled snow or ice, there are no concerns; the rubber acts just as it should. Therefore, I advise tires if your area has snowy winters and you must travel on snowy roads; but, if the roads are clear for the majority of the winter, I would suggest looking at something different.