265/55R20
A 265/55R20 tire is 31.48 inches tall and 10.4 inches wide, with a 5.74-inch sidewall, mounted on a 20-inch wheel.
Overall diameter
31.48″
799 mm
Sidewall height
5.74″
145.8 mm
Tread width
265 mm
10.4″
Circumference
98.89″
8.2 ft
Revs per mile
641
398 per km
Wheel diameter
20″
aspect ratio 55%
Cross-section
- Overall diameter
- 31.48″
- Sidewall (each side)
- 5.74″
- Wheel
- 20″
265/55R20 in inches and millimeters
Every dimension of a 265/55R20, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 31.48″ | 799 mm |
| Tread width | 10.4″ | 265 mm |
| Sidewall height | 5.74″ | 145.8 mm |
| Wheel diameter | 20″ | 508 mm |
| Circumference | 98.89″ | 2512 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.
265/55R20 compared with other sizes
All 33 practical swaps involving 265/55R20 — diameter change, speedometer impact and a fit verdict for each.
265/55R20 → 275/55R20
275/55R20
Diameter −1.4% · This fits
265/55R20 → 265/65R18
265/65R18
Diameter −0.3% · This fits
265/55R20 → 285/60R18
285/60R18
Diameter +0.0% · This fits
265/55R20 → 255/50R20
255/50R20
Diameter +4.8% · Borderline. Check clearance first
265/55R20 → 255/55R20
255/55R20
Diameter +1.4% · This fits
265/55R20 → 265/50R20
265/50R20
Diameter +3.4% · Borderline. Check clearance first
285/50R20 → 265/55R20
285/50R20
Diameter −0.8% · This fits
255/55R20 → 265/55R20
255/55R20
Diameter −1.4% · This fits
275/55R20 → 265/55R20
275/55R20
Diameter +1.4% · This fits
305/50R20 → 265/55R20
305/50R20
Diameter +1.7% · This fits
265/50R20 → 265/55R20
265/50R20
Diameter −3.3% · Borderline. Check clearance first
265/60R20 → 265/55R20
265/60R20
Diameter +3.3% · Borderline. Check clearance first
285/55R20 → 265/55R20
285/55R20
Diameter +2.8% · This fits
265/65R18 → 265/55R20
265/65R18
Diameter +0.3% · This fits
255/50R20 → 265/55R20
255/50R20
Diameter −4.6% · Borderline. Check clearance first
275/60R20 → 265/55R20
275/60R20
Diameter +4.8% · Borderline. Check clearance first
285/60R18 → 265/55R20
285/60R18
Diameter −0.0% · This fits
275/50R21 → 265/55R20
275/50R21
Diameter +1.1% · This fits
285/45R21 → 265/55R20
285/45R21
Diameter −1.2% · This fits
255/65R18 → 265/55R20
255/65R18
Diameter −1.4% · This fits
265/55R20 → 265/60R20
265/60R20
Diameter −3.2% · Borderline. Check clearance first
265/55R20 → 275/60R20
275/60R20
Diameter −4.6% · Borderline. Check clearance first
265/55R20 → 285/50R20
285/50R20
Diameter +0.8% · This fits
265/55R20 → 285/55R20
285/55R20
Diameter −2.7% · This fits
265/55R20 → 305/50R20
305/50R20
Diameter −1.7% · This fits
265/55R20 → 305/55R20
305/55R20
Diameter −5.2% · Too big a jump
265/55R20 → 275/50R21
275/50R21
Diameter −1.1% · This fits
265/55R20 → 285/45R21
285/45R21
Diameter +1.2% · This fits
265/55R20 → 275/40R22
275/40R22
Diameter +2.7% · This fits
265/55R20 → 275/50R22
275/50R22
Diameter −4.1% · Borderline. Check clearance first
265/55R20 → 285/40R22
285/40R22
Diameter +1.6% · This fits
265/55R20 → 285/45R22
285/45R22
Diameter −1.9% · This fits
265/55R20 → 305/45R22
305/45R22
Diameter −4.1% · Borderline. Check clearance first
Common questions
- What is 265/55R20 in inches?
- A 265/55R20 tire is 31.48 inches tall and 10.4 inches wide, with a 5.74-inch sidewall, mounted on a 20-inch wheel. In metric that is 799 mm tall and 265 mm wide. The circumference is 98.89 inches.
- How tall is a 265/55R20 tire?
- 31.48 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 265/55R20 mean?
- 265 is the tread width in millimeters, 55 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 265 × 55% = 145.8 mm tall.