Actually, 195/55-15 are SMALLER, by 0.3 inches overall, the 195/60-15 are LARGER, be 0.5 inches. However, in snow I would rather go a little larger. By the way, the MP3 and Mazdaspeed tire setup are larger still so I foresee no problems with going a little larger. (Stock 23.7") (Mazdaspeed 24.5"...