285/60R18
A 285/60R18 tire is 31.46 inches tall and 11.2 inches wide, with a 6.73-inch sidewall, mounted on a 18-inch wheel.
Overall diameter
31.46″
799 mm
Sidewall height
6.73″
171.0 mm
Tread width
285 mm
11.2″
Circumference
98.85″
8.2 ft
Revs per mile
641
398 per km
Wheel diameter
18″
aspect ratio 60%
Cross-section
- Overall diameter
- 31.46″
- Sidewall (each side)
- 6.73″
- Wheel
- 18″
285/60R18 in inches and millimeters
Every dimension of a 285/60R18, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 31.46″ | 799 mm |
| Tread width | 11.2″ | 285 mm |
| Sidewall height | 6.73″ | 171.0 mm |
| Wheel diameter | 18″ | 457 mm |
| Circumference | 98.85″ | 2511 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.
285/60R18 compared with other sizes
All 34 practical swaps involving 285/60R18 — diameter change, speedometer impact and a fit verdict for each.
285/60R18 → 265/70R17
265/70R17
Diameter −0.4% · This fits
285/60R18 → 265/60R18
265/60R18
Diameter +3.1% · Borderline. Check clearance first
285/60R18 → 265/75R16
265/75R16
Diameter −0.6% · This fits
285/60R18 → 285/75R16
285/75R16
Diameter −4.2% · Borderline. Check clearance first
285/60R18 → 245/75R17
245/75R17
Diameter −0.0% · This fits
285/60R18 → 245/65R18
245/65R18
Diameter +3.0% · Borderline. Check clearance first
285/60R18 → 255/60R18
255/60R18
Diameter +4.7% · Borderline. Check clearance first
285/60R18 → 255/65R18
255/65R18
Diameter +1.3% · This fits
285/60R18 → 255/70R18
255/70R18
Diameter −1.8% · This fits
285/60R18 → 265/65R18
265/65R18
Diameter −0.3% · This fits
285/60R18 → 265/70R18
265/70R18
Diameter −3.5% · Borderline. Check clearance first
285/60R18 → 275/60R18
275/60R18
Diameter +1.5% · This fits
285/60R18 → 275/65R18
275/65R18
Diameter −1.9% · This fits
285/60R18 → 275/70R18
275/70R18
Diameter −5.1% · Too big a jump
265/65R18 → 285/60R18
265/65R18
Diameter +0.3% · This fits
255/65R18 → 285/60R18
255/65R18
Diameter −1.3% · This fits
275/60R18 → 285/60R18
275/60R18
Diameter −1.5% · This fits
255/70R18 → 285/60R18
255/70R18
Diameter +1.9% · This fits
275/65R18 → 285/60R18
275/65R18
Diameter +1.9% · This fits
285/65R18 → 285/60R18
285/65R18
Diameter +3.6% · Borderline. Check clearance first
245/65R18 → 285/60R18
245/65R18
Diameter −2.9% · This fits
265/60R18 → 285/60R18
265/60R18
Diameter −3.0% · Borderline. Check clearance first
305/60R18 → 285/60R18
305/60R18
Diameter +3.0% · Borderline. Check clearance first
265/70R18 → 285/60R18
265/70R18
Diameter +3.6% · Borderline. Check clearance first
255/60R18 → 285/60R18
255/60R18
Diameter −4.5% · Borderline. Check clearance first
285/50R20 → 285/60R18
285/50R20
Diameter −0.8% · This fits
245/75R17 → 285/60R18
245/75R17
Diameter +0.0% · This fits
265/55R20 → 285/60R18
265/55R20
Diameter +0.0% · This fits
285/60R18 → 285/65R18
285/65R18
Diameter −3.4% · Borderline. Check clearance first
285/60R18 → 305/60R18
305/60R18
Diameter −2.9% · This fits
285/60R18 → 255/60R19
255/60R19
Diameter +1.3% · This fits
285/60R18 → 265/55R20
265/55R20
Diameter −0.0% · This fits
285/60R18 → 285/50R20
285/50R20
Diameter +0.8% · This fits
285/60R18 → 235/45R18
235/45R18
Diameter +19.5% · Too big a jump
Common questions
- What is 285/60R18 in inches?
- A 285/60R18 tire is 31.46 inches tall and 11.2 inches wide, with a 6.73-inch sidewall, mounted on a 18-inch wheel. In metric that is 799 mm tall and 285 mm wide. The circumference is 98.85 inches.
- How tall is a 285/60R18 tire?
- 31.46 inches, or 799 mm. That is the overall diameter, wheel included. It turns about 641 times per mile, which is what your speedometer counts.
- What do the numbers in 285/60R18 mean?
- 285 is the tread width in millimeters, 60 is the aspect ratio — the sidewall height as a percentage of the tread width — and 18 is the wheel diameter in inches. So the sidewall is 285 × 60% = 171.0 mm tall.