Do smart cars have different size tyres?

Smart Fortwo Tyre Options With many different generations of Smart Fortwo, there are a number of different tyres suitable for each variation. The most popular sizes of tyres for the Smart Fortwo that are used regularly are: 175/55 R15. R15. Popular tire sizes for the Smart fortwo include 155/60R15 for the front and 175/55R15 for the rear, though specifications vary by model year and trim level.