Knowledge index

What do tire size numbers mean?

A tire size like 205/55 R16 encodes four physical facts — section width in millimetres, sidewall aspect ratio, radial construction, and wheel rim diameter in inches. Pick any popular size below for a plain-language breakdown, visual, dimensions and driving context.

How to read a tire size

  1. 205 — section width in mm (sidewall to sidewall).
  2. 55 — aspect ratio (sidewall height as % of width).
  3. R — radial construction, the modern standard.
  4. 16 — wheel rim diameter in inches.

13-inch wheel sizes

5 sizes

14-inch wheel sizes

8 sizes

15-inch wheel sizes

13 sizes

16-inch wheel sizes

17 sizes

17-inch wheel sizes

20 sizes

18-inch wheel sizes

24 sizes

19-inch wheel sizes

17 sizes

20-inch wheel sizes

17 sizes

21-inch wheel sizes

5 sizes

22-inch wheel sizes

8 sizes