Originally Posted by tarmpung
So, do you have to change spare tire also? will it still fit when placing into well trunk? Or you don't need to spare tire anymore?
Why not change the brand of tyre and keep the same size? That way, you'll be able to keep the spare and save some money. If it's full-size and you want to include it in the rotation, best to swap it too. Unless you have money to burn, leave the upgrade until the original tyres are well worn.
Do you have a full-size spare? In some countries, KIA only supplies a repair kit; other possiblity is that you have a temporary spare. In most cases there's plenty of room in the trunk for a full-size spare. This underlines the craziness of the temporary spare phenomenon: (Too small to be of much use; saves an insignificant amount of weight; expensive to repair/replace).
The Yokohama tyres mentioned in a couple of posts generally have a fairly conservative tread pattern, and this helps to keep down road noise. I've noticed that some brands (e.g. Michelin), get noisier as the tread wears.