It seems to me that with every new model of a car, tires are getting bigger. For example, 17 years ago I had Mitsubishi Mirage and it came with P155/80R13. Today I have a Hyundai Accent, and it came with P175/70R14.
What is the purpose of a bigger tire? Why do newer cars come with bigger tires? Is it related to the increasing weight of cars? Is it for stability, fuel economy, or comfort?