185/65R15
A 185/65R15 tire is 24.47 inches tall and 7.3 inches wide, with a 4.73-inch sidewall, mounted on a 15-inch wheel.
Common fitments: Rio, Accent, Mirage
Overall diameter
24.47″
622 mm
Sidewall height
4.73″
120.3 mm
Tread width
185 mm
7.3″
Circumference
76.87″
6.4 ft
Revs per mile
824
512 per km
Wheel diameter
15″
aspect ratio 65%
Cross-section
- Overall diameter
- 24.47″
- Sidewall (each side)
- 4.73″
- Wheel
- 15″
185/65R15 in inches and millimeters
Every dimension of a 185/65R15, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 24.47″ | 622 mm |
| Tread width | 7.3″ | 185 mm |
| Sidewall height | 4.73″ | 120.3 mm |
| Wheel diameter | 15″ | 381 mm |
| Circumference | 76.87″ | 1952 mm |
Nominal dimensions from the size code. A real tire varies by a few millimeters between manufacturers, and a loaded tire sits slightly shorter than its free diameter.
185/65R15 compared with other sizes
All 25 practical swaps involving 185/65R15 — diameter change, speedometer impact and a fit verdict for each.
185/65R15 → 175/65R15
175/65R15
Diameter +2.1% · This fits
185/65R15 → 185/60R15
185/60R15
Diameter +3.1% · Borderline. Check clearance first
195/60R15 → 185/65R15
195/60R15
Diameter −1.0% · This fits
185/60R15 → 185/65R15
185/60R15
Diameter −3.0% · This fits
175/65R15 → 185/65R15
175/65R15
Diameter −2.1% · This fits
195/65R15 → 185/65R15
195/65R15
Diameter +2.1% · This fits
205/65R15 → 185/65R15
205/65R15
Diameter +4.2% · Borderline. Check clearance first
195/55R16 → 185/65R15
195/55R16
Diameter −0.1% · This fits
215/45R17 → 185/65R15
215/45R17
Diameter +0.6% · This fits
185/55R16 → 185/65R15
185/55R16
Diameter −1.9% · This fits
205/55R16 → 185/65R15
205/55R16
Diameter +1.7% · This fits
225/45R17 → 185/65R15
225/45R17
Diameter +2.1% · This fits
205/50R17 → 185/65R15
205/50R17
Diameter +2.5% · This fits
195/50R16 → 185/65R15
195/50R16
Diameter −3.2% · Borderline. Check clearance first
215/55R16 → 185/65R15
215/55R16
Diameter +3.4% · Borderline. Check clearance first
215/50R17 → 185/65R15
215/50R17
Diameter +4.1% · Borderline. Check clearance first
185/65R15 → 195/60R15
195/60R15
Diameter +1.1% · This fits
185/65R15 → 195/65R15
195/65R15
Diameter −2.0% · This fits
185/65R15 → 205/65R15
205/65R15
Diameter −4.0% · Borderline. Check clearance first
185/65R15 → 185/55R16
185/55R16
Diameter +1.9% · This fits
185/65R15 → 195/50R16
195/50R16
Diameter +3.3% · Borderline. Check clearance first
185/65R15 → 195/55R16
195/55R16
Diameter +0.1% · This fits
185/65R15 → 205/55R16
205/55R16
Diameter −1.6% · This fits
185/65R15 → 215/45R17
215/45R17
Diameter −0.6% · This fits
185/65R15 → 225/45R17
225/45R17
Diameter −2.0% · This fits
Common questions
- What is 185/65R15 in inches?
- A 185/65R15 tire is 24.47 inches tall and 7.3 inches wide, with a 4.73-inch sidewall, mounted on a 15-inch wheel. In metric that is 622 mm tall and 185 mm wide. The circumference is 76.87 inches.
- How tall is a 185/65R15 tire?
- 24.47 inches, or 622 mm. That is the overall diameter, wheel included. It turns about 824 times per mile, which is what your speedometer counts.
- What do the numbers in 185/65R15 mean?
- 185 is the tread width in millimeters, 65 is the aspect ratio — the sidewall height as a percentage of the tread width — and 15 is the wheel diameter in inches. So the sidewall is 185 × 65% = 120.3 mm tall.