265/45R20
Overall diameter
29.39″
747 mm
Sidewall height
4.69″
119.3 mm
Tread width
265 mm
10.4″
Circumference
92.33″
7.7 ft
Revs per mile
686
426 per km
Wheel diameter
20″
aspect ratio 45%
Cross-section
- Overall diameter
- 29.39″
- Sidewall (each side)
- 4.69″
- Wheel
- 20″
265/45R20 compared with other sizes
All 30 practical swaps involving 265/45R20 — diameter change, speedometer impact and a fit verdict for each.
265/45R20 → 265/50R19
265/50R19
Diameter −0.1% · Good fit
265/45R20 → 255/45R20
255/45R20
Diameter +1.2% · Good fit
265/45R20 → 275/45R20
275/45R20
Diameter −1.2% · Good fit
265/45R20 → 295/35R20
295/35R20
Diameter +4.5% · Marginal fit — proceed with care
265/45R20 → 235/55R19
235/55R19
Diameter +0.7% · Good fit
265/45R20 → 245/55R19
245/55R19
Diameter −0.7% · Good fit
265/45R20 → 255/50R19
255/50R19
Diameter +1.2% · Good fit
265/45R20 → 245/45R20
245/45R20
Diameter +2.5% · Good fit
265/45R20 → 245/50R20
245/50R20
Diameter −0.9% · Good fit
265/45R20 → 255/50R20
255/50R20
Diameter −2.2% · Good fit
245/50R20 → 265/45R20
245/50R20
Diameter +0.9% · Good fit
255/45R20 → 265/45R20
255/45R20
Diameter −1.2% · Good fit
275/45R20 → 265/45R20
275/45R20
Diameter +1.2% · Good fit
255/50R20 → 265/45R20
255/50R20
Diameter +2.2% · Good fit
265/50R20 → 265/45R20
265/50R20
Diameter +3.5% · Marginal fit — proceed with care
245/45R20 → 265/45R20
245/45R20
Diameter −2.4% · Good fit
275/40R20 → 265/45R20
275/40R20
Diameter −2.5% · Good fit
265/50R19 → 265/45R20
265/50R19
Diameter +0.1% · Good fit
265/40R21 → 265/45R20
265/40R21
Diameter −0.1% · Good fit
295/35R20 → 265/45R20
295/35R20
Diameter −4.3% · Marginal fit — proceed with care
245/60R18 → 265/45R20
245/60R18
Diameter +0.6% · Good fit
235/55R19 → 265/45R20
235/55R19
Diameter −0.7% · Good fit
245/55R19 → 265/45R20
245/55R19
Diameter +0.8% · Good fit
235/60R18 → 265/45R20
235/60R18
Diameter −1.0% · Good fit
265/45R20 → 265/50R20
265/50R20
Diameter −3.4% · Marginal fit — proceed with care
265/45R20 → 275/40R20
275/40R20
Diameter +2.5% · Good fit
265/45R20 → 265/40R21
265/40R21
Diameter +0.1% · Good fit
265/45R20 → 265/45R21
265/45R21
Diameter −3.3% · Marginal fit — proceed with care
265/45R20 → 285/40R21
285/40R21
Diameter −2.0% · Good fit
265/45R20 → 275/55R20
275/55R20
Diameter −7.9% · Not recommended
Common questions
- What is the overall diameter of a 265/45R20 tire?
- A 265/45R20 tire is about 29.39″ (747 mm) in overall diameter, with a sidewall height of 119.3 mm and a circumference of 92.33″.
- How many revolutions per mile does a 265/45R20 tire turn?
- A 265/45R20 turns roughly 686 revolutions per mile (426 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 265/45R20 mean?
- 265 is the tread width in millimetres, 45 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 × 45% = 119.3 mm tall.