245/50R20
Common fitments: Charger AWD, 5 Series
Overall diameter
29.65″
753 mm
Sidewall height
4.82″
122.5 mm
Tread width
245 mm
9.6″
Circumference
93.13″
7.8 ft
Revs per mile
680
423 per km
Wheel diameter
20″
aspect ratio 50%
Cross-section
- Overall diameter
- 29.65″
- Sidewall (each side)
- 4.82″
- Wheel
- 20″
245/50R20 compared with other sizes
All 29 practical swaps involving 245/50R20 — diameter change, speedometer impact and a fit verdict for each.
245/50R20 → 265/50R19
265/50R19
Diameter +0.7% · Good fit
245/50R20 → 255/45R20
255/45R20
Diameter +2.1% · Good fit
245/50R20 → 275/45R20
275/45R20
Diameter −0.3% · Good fit
245/50R20 → 245/60R18
245/60R18
Diameter +0.2% · Good fit
245/50R20 → 245/55R19
245/55R19
Diameter +0.1% · Good fit
245/50R20 → 245/45R20
245/45R20
Diameter +3.4% · Marginal fit — proceed with care
275/45R20 → 245/50R20
275/45R20
Diameter +0.3% · Good fit
265/45R20 → 245/50R20
265/45R20
Diameter −0.9% · Good fit
255/50R20 → 245/50R20
255/50R20
Diameter +1.3% · Good fit
245/45R20 → 245/50R20
245/45R20
Diameter −3.3% · Marginal fit — proceed with care
255/45R20 → 245/50R20
255/45R20
Diameter −2.1% · Good fit
265/50R20 → 245/50R20
265/50R20
Diameter +2.7% · Good fit
275/40R20 → 245/50R20
275/40R20
Diameter −3.3% · Marginal fit — proceed with care
245/55R19 → 245/50R20
245/55R19
Diameter −0.1% · Good fit
245/60R18 → 245/50R20
245/60R18
Diameter −0.2% · Good fit
255/55R20 → 245/50R20
255/55R20
Diameter +4.7% · Marginal fit — proceed with care
285/50R20 → 245/50R20
285/50R20
Diameter +5.3% · Not recommended
265/50R19 → 245/50R20
265/50R19
Diameter −0.7% · Good fit
265/40R21 → 245/50R20
265/40R21
Diameter −1.0% · Good fit
285/40R21 → 245/50R20
285/40R21
Diameter +1.1% · Good fit
245/50R20 → 255/50R20
255/50R20
Diameter −1.3% · Good fit
245/50R20 → 255/55R20
255/55R20
Diameter −4.5% · Marginal fit — proceed with care
245/50R20 → 265/45R20
265/45R20
Diameter +0.9% · Good fit
245/50R20 → 265/50R20
265/50R20
Diameter −2.6% · Good fit
245/50R20 → 275/40R20
275/40R20
Diameter +3.4% · Marginal fit — proceed with care
245/50R20 → 285/50R20
285/50R20
Diameter −5.0% · Not recommended
245/50R20 → 265/40R21
265/40R21
Diameter +1.0% · Good fit
245/50R20 → 285/40R21
285/40R21
Diameter −1.1% · Good fit
245/50R20 → 275/55R20
275/55R20
Diameter −7.1% · Not recommended
Common questions
- What is the overall diameter of a 245/50R20 tire?
- A 245/50R20 tire is about 29.65″ (753 mm) in overall diameter, with a sidewall height of 122.5 mm and a circumference of 93.13″.
- How many revolutions per mile does a 245/50R20 tire turn?
- A 245/50R20 turns roughly 680 revolutions per mile (423 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 245/50R20 mean?
- 245 is the tread width in millimetres, 50 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 245 × 50% = 122.5 mm tall.