185/55R16
Common fitments: Fit Sport, Swift
Overall diameter
24.01″
610 mm
Sidewall height
4.01″
101.8 mm
Tread width
185 mm
7.3″
Circumference
75.44″
6.3 ft
Revs per mile
840
522 per km
Wheel diameter
16″
aspect ratio 55%
Cross-section
- Overall diameter
- 24.01″
- Sidewall (each side)
- 4.01″
- Wheel
- 16″
185/55R16 compared with other sizes
All 24 practical swaps involving 185/55R16 — diameter change, speedometer impact and a fit verdict for each.
185/55R16 → 175/65R15
175/65R15
Diameter +0.2% · Good fit
185/55R16 → 185/60R15
185/60R15
Diameter +1.1% · Good fit
185/55R16 → 185/65R15
185/65R15
Diameter −1.9% · Good fit
185/55R16 → 195/60R15
195/60R15
Diameter −0.8% · Good fit
195/50R16 → 185/55R16
195/50R16
Diameter −1.4% · Good fit
195/55R16 → 185/55R16
195/55R16
Diameter +1.8% · Good fit
205/55R16 → 185/55R16
205/55R16
Diameter +3.6% · Marginal fit — proceed with care
185/60R15 → 185/55R16
185/60R15
Diameter −1.1% · Good fit
175/65R15 → 185/55R16
175/65R15
Diameter −0.2% · Good fit
215/55R16 → 185/55R16
215/55R16
Diameter +5.4% · Not recommended
185/65R15 → 185/55R16
185/65R15
Diameter +1.9% · Good fit
195/60R15 → 185/55R16
195/60R15
Diameter +0.8% · Good fit
215/45R17 → 185/55R16
215/45R17
Diameter +2.5% · Good fit
225/45R17 → 185/55R16
225/45R17
Diameter +4.0% · Marginal fit — proceed with care
195/65R15 → 185/55R16
195/65R15
Diameter +4.0% · Marginal fit — proceed with care
175/65R14 → 185/55R16
175/65R14
Diameter −4.4% · Marginal fit — proceed with care
205/50R17 → 185/55R16
205/50R17
Diameter +4.4% · Marginal fit — proceed with care
225/40R18 → 185/55R16
225/40R18
Diameter +4.5% · Marginal fit — proceed with care
185/55R16 → 195/50R16
195/50R16
Diameter +1.4% · Good fit
185/55R16 → 195/55R16
195/55R16
Diameter −1.8% · Good fit
185/55R16 → 205/55R16
205/55R16
Diameter −3.5% · Marginal fit — proceed with care
185/55R16 → 215/55R16
215/55R16
Diameter −5.1% · Not recommended
185/55R16 → 215/45R17
215/45R17
Diameter −2.5% · Good fit
185/55R16 → 175/65R14
175/65R14
Diameter +4.6% · Marginal fit — proceed with care
Common questions
- What is the overall diameter of a 185/55R16 tire?
- A 185/55R16 tire is about 24.01″ (610 mm) in overall diameter, with a sidewall height of 101.8 mm and a circumference of 75.44″.
- How many revolutions per mile does a 185/55R16 tire turn?
- A 185/55R16 turns roughly 840 revolutions per mile (522 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 185/55R16 mean?
- 185 is the tread width in millimetres, 55 is the aspect ratio — the sidewall height as a percentage of the tread width — and 16 is the wheel diameter in inches. So the sidewall is 185 × 55% = 101.8 mm tall.