I had brand new 16 in rims that fit this Kia. I went on internet and found 235/70R16 the same circumferance as the 18 inch. I had used this brand with studs on other vehicles. This is my 4th year on this set of tires and still don't really need to change, but with medical milage coming up, I will buy them again if they are still studable. I travel in ice, snow and slush. These tires are the best I have used with studs in the 60 years I have been driving, over 800,000 miles. Even though odd size, the speedometer is right on the money