275/65R20
A 275/65R20 tire is 34.07 inches tall and 10.8 inches wide, with a 7.04-inch sidewall, mounted on a 20-inch wheel.
Overall diameter
34.07″
865 mm
Sidewall height
7.04″
178.8 mm
Tread width
275 mm
10.8″
Circumference
107.05″
8.9 ft
Revs per mile
592
368 per km
Wheel diameter
20″
aspect ratio 65%
Cross-section
- Overall diameter
- 34.07″
- Sidewall (each side)
- 7.04″
- Wheel
- 20″
275/65R20 in inches and millimeters
Every dimension of a 275/65R20, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 34.07″ | 865 mm |
| Tread width | 10.8″ | 275 mm |
| Sidewall height | 7.04″ | 178.8 mm |
| Wheel diameter | 20″ | 508 mm |
| Circumference | 107.05″ | 2719 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.
275/65R20 compared with other sizes
All 28 practical swaps involving 275/65R20 — diameter change, speedometer impact and a fit verdict for each.
275/65R20 → 285/70R18
285/70R18
Diameter +1.1% · This fits
275/65R20 → 295/70R18
295/70R18
Diameter −0.5% · This fits
275/65R20 → 265/60R20
265/60R20
Diameter +4.8% · Borderline. Check clearance first
275/65R20 → 275/60R20
275/60R20
Diameter +3.3% · Borderline. Check clearance first
295/60R20 → 275/65R20
295/60R20
Diameter −0.4% · This fits
285/65R20 → 275/65R20
285/65R20
Diameter +1.5% · This fits
285/60R20 → 275/65R20
285/60R20
Diameter −1.8% · This fits
275/60R20 → 275/65R20
275/60R20
Diameter −3.2% · Borderline. Check clearance first
305/55R20 → 275/65R20
305/55R20
Diameter −2.5% · This fits
295/65R20 → 275/65R20
295/65R20
Diameter +3.0% · Borderline. Check clearance first
265/60R20 → 275/65R20
265/60R20
Diameter −4.6% · Borderline. Check clearance first
285/55R20 → 275/65R20
285/55R20
Diameter −5.1% · Too big a jump
295/70R18 → 275/65R20
295/70R18
Diameter +0.5% · This fits
285/70R18 → 275/65R20
285/70R18
Diameter −1.1% · This fits
275/70R18 → 275/65R20
275/70R18
Diameter −2.7% · This fits
275/50R22 → 275/65R20
275/50R22
Diameter −3.7% · Borderline. Check clearance first
285/50R22 → 275/65R20
285/50R22
Diameter −2.5% · This fits
305/45R22 → 275/65R20
305/45R22
Diameter −3.7% · Borderline. Check clearance first
275/65R20 → 285/55R20
285/55R20
Diameter +5.4% · Too big a jump
275/65R20 → 285/60R20
285/60R20
Diameter +1.8% · This fits
275/65R20 → 285/65R20
285/65R20
Diameter −1.5% · This fits
275/65R20 → 295/60R20
295/60R20
Diameter +0.4% · This fits
275/65R20 → 295/65R20
295/65R20
Diameter −2.9% · This fits
275/65R20 → 305/55R20
305/55R20
Diameter +2.6% · This fits
275/65R20 → 275/50R22
275/50R22
Diameter +3.8% · Borderline. Check clearance first
275/65R20 → 285/50R22
285/50R22
Diameter +2.6% · This fits
275/65R20 → 305/45R22
305/45R22
Diameter +3.9% · Borderline. Check clearance first
275/65R20 → 275/55R20
275/55R20
Diameter +6.8% · Too big a jump
Common questions
- What is 275/65R20 in inches?
- A 275/65R20 tire is 34.07 inches tall and 10.8 inches wide, with a 7.04-inch sidewall, mounted on a 20-inch wheel. In metric that is 865 mm tall and 275 mm wide. The circumference is 107.05 inches.
- How tall is a 275/65R20 tire?
- 34.07 inches, or 865 mm. That is the overall diameter, wheel included. It turns about 592 times per mile, which is what your speedometer counts.
- What do the numbers in 275/65R20 mean?
- 275 is the tread width in millimeters, 65 is the aspect ratio — the sidewall height as a percentage of the tread width — and 20 is the wheel diameter in inches. So the sidewall is 275 × 65% = 178.8 mm tall.