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
- 205 — section width in mm (sidewall to sidewall).
- 55 — aspect ratio (sidewall height as % of width).
- R — radial construction, the modern standard.
- 16 — wheel rim diameter in inches.
13-inch wheel sizes
5 sizes
14-inch wheel sizes
8 sizes
15-inch wheel sizes
13 sizes
175/65 R15
What it means →
185/55 R15
What it means →
185/60 R15
What it means →
185/65 R15
What it means →
195/50 R15
What it means →
195/55 R15
What it means →
195/60 R15
What it means →
195/65 R15
What it means →
205/60 R15
What it means →
205/65 R15
What it means →
205/70 R15
What it means →
215/65 R15
What it means →
215/70 R15
What it means →
16-inch wheel sizes
17 sizes
195/50 R16
What it means →
195/55 R16
What it means →
195/60 R16
What it means →
205/45 R16
What it means →
205/50 R16
What it means →
205/55 R16
What it means →
205/60 R16
What it means →
215/50 R16
What it means →
215/55 R16
What it means →
215/60 R16
What it means →
215/65 R16
What it means →
225/50 R16
What it means →
225/55 R16
What it means →
225/60 R16
What it means →
235/60 R16
What it means →
235/65 R16
What it means →
245/70 R16
What it means →
17-inch wheel sizes
20 sizes
205/40 R17
What it means →
205/45 R17
What it means →
205/50 R17
What it means →
215/40 R17
What it means →
215/45 R17
What it means →
215/50 R17
What it means →
215/55 R17
What it means →
215/60 R17
What it means →
225/45 R17
What it means →
225/50 R17
What it means →
225/55 R17
What it means →
225/60 R17
What it means →
225/65 R17
What it means →
235/45 R17
What it means →
235/55 R17
What it means →
235/65 R17
What it means →
245/40 R17
What it means →
245/45 R17
What it means →
245/65 R17
What it means →
255/40 R17
What it means →
18-inch wheel sizes
24 sizes
215/40 R18
What it means →
215/45 R18
What it means →
225/40 R18
What it means →
225/45 R18
What it means →
225/50 R18
What it means →
225/55 R18
What it means →
235/40 R18
What it means →
235/45 R18
What it means →
235/50 R18
What it means →
235/55 R18
What it means →
235/60 R18
What it means →
245/35 R18
What it means →
245/40 R18
What it means →
245/45 R18
What it means →
245/60 R18
What it means →
255/35 R18
What it means →
255/40 R18
What it means →
255/45 R18
What it means →
255/55 R18
What it means →
265/40 R18
What it means →
265/60 R18
What it means →
275/35 R18
What it means →
275/40 R18
What it means →
285/60 R18
What it means →
19-inch wheel sizes
17 sizes
225/35 R19
What it means →
225/40 R19
What it means →
225/45 R19
What it means →
235/35 R19
What it means →
235/40 R19
What it means →
235/55 R19
What it means →
245/35 R19
What it means →
245/40 R19
What it means →
245/45 R19
What it means →
255/35 R19
What it means →
255/40 R19
What it means →
255/45 R19
What it means →
255/50 R19
What it means →
265/35 R19
What it means →
275/35 R19
What it means →
275/40 R19
What it means →
285/35 R19
What it means →
20-inch wheel sizes
17 sizes
245/35 R20
What it means →
245/40 R20
What it means →
245/45 R20
What it means →
255/35 R20
What it means →
255/45 R20
What it means →
255/50 R20
What it means →
265/35 R20
What it means →
265/40 R20
What it means →
265/50 R20
What it means →
275/35 R20
What it means →
275/40 R20
What it means →
275/45 R20
What it means →
285/30 R20
What it means →
285/35 R20
What it means →
295/35 R20
What it means →
295/40 R20
What it means →
305/30 R20
What it means →
21-inch wheel sizes
5 sizes