285/60R20
Overall diameter
33.46″
850 mm
Sidewall height
6.73″
171.0 mm
Tread width
285 mm
11.2″
Circumference
105.13″
8.8 ft
Revs per mile
603
374 per km
Wheel diameter
20″
aspect ratio 60%
Cross-section
- Overall diameter
- 33.46″
- Sidewall (each side)
- 6.73″
- Wheel
- 20″
285/60R20 compared with other sizes
All 30 practical swaps involving 285/60R20 — diameter change, speedometer impact and a fit verdict for each.
285/60R20 → 275/55R20
275/55R20
Diameter +4.9% · Marginal fit — proceed with care
285/60R20 → 275/70R18
275/70R18
Diameter +0.9% · Good fit
285/60R20 → 285/70R18
285/70R18
Diameter −0.7% · Good fit
285/60R20 → 295/70R18
295/70R18
Diameter −2.3% · Good fit
285/60R20 → 265/60R20
265/60R20
Diameter +2.9% · Good fit
285/60R20 → 275/60R20
275/60R20
Diameter +1.4% · Good fit
285/60R20 → 275/65R20
275/65R20
Diameter −1.8% · Good fit
285/60R20 → 285/55R20
285/55R20
Diameter +3.5% · Marginal fit — proceed with care
305/55R20 → 285/60R20
305/55R20
Diameter −0.8% · Good fit
275/60R20 → 285/60R20
275/60R20
Diameter −1.4% · Good fit
295/60R20 → 285/60R20
295/60R20
Diameter +1.4% · Good fit
275/65R20 → 285/60R20
275/65R20
Diameter +1.8% · Good fit
285/55R20 → 285/60R20
285/55R20
Diameter −3.4% · Marginal fit — proceed with care
285/65R20 → 285/60R20
285/65R20
Diameter +3.4% · Marginal fit — proceed with care
265/60R20 → 285/60R20
265/60R20
Diameter −2.8% · Good fit
305/50R20 → 285/60R20
305/50R20
Diameter −4.4% · Marginal fit — proceed with care
285/70R18 → 285/60R20
285/70R18
Diameter +0.7% · Good fit
285/50R22 → 285/60R20
285/50R22
Diameter −0.7% · Good fit
275/55R20 → 285/60R20
275/55R20
Diameter −4.6% · Marginal fit — proceed with care
295/65R20 → 285/60R20
295/65R20
Diameter +4.9% · Marginal fit — proceed with care
275/70R18 → 285/60R20
275/70R18
Diameter −0.9% · Good fit
285/65R18 → 285/60R20
285/65R18
Diameter −2.6% · Good fit
285/60R20 → 285/65R20
285/65R20
Diameter −3.2% · Marginal fit — proceed with care
285/60R20 → 295/60R20
295/60R20
Diameter −1.4% · Good fit
285/60R20 → 295/65R20
295/65R20
Diameter −4.7% · Marginal fit — proceed with care
285/60R20 → 305/50R20
305/50R20
Diameter +4.6% · Marginal fit — proceed with care
285/60R20 → 305/55R20
305/55R20
Diameter +0.8% · Good fit
285/60R20 → 275/50R22
275/50R22
Diameter +1.9% · Good fit
285/60R20 → 285/50R22
285/50R22
Diameter +0.7% · Good fit
285/60R20 → 305/45R22
305/45R22
Diameter +2.0% · Good fit
Common questions
- What is the overall diameter of a 285/60R20 tire?
- A 285/60R20 tire is about 33.46″ (850 mm) in overall diameter, with a sidewall height of 171.0 mm and a circumference of 105.13″.
- How many revolutions per mile does a 285/60R20 tire turn?
- A 285/60R20 turns roughly 603 revolutions per mile (374 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 285/60R20 mean?
- 285 is the tread width in millimetres, 60 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 285 × 60% = 171.0 mm tall.