285/40R22
Overall diameter
30.98″
787 mm
Sidewall height
4.49″
114.0 mm
Tread width
285 mm
11.2″
Circumference
97.32″
8.1 ft
Revs per mile
651
405 per km
Wheel diameter
22″
aspect ratio 40%
Cross-section
- Overall diameter
- 30.98″
- Sidewall (each side)
- 4.49″
- Wheel
- 22″
285/40R22 compared with other sizes
All 22 practical swaps involving 285/40R22 — diameter change, speedometer impact and a fit verdict for each.
285/40R22 → 255/55R20
255/55R20
Diameter −0.2% · Good fit
285/40R22 → 285/50R20
285/50R20
Diameter −0.8% · Good fit
285/40R22 → 265/45R21
265/45R21
Diameter +1.9% · Good fit
285/40R22 → 275/45R21
275/45R21
Diameter +0.8% · Good fit
285/40R22 → 285/40R21
285/40R21
Diameter +3.3% · Marginal fit — proceed with care
285/40R22 → 285/45R21
285/45R21
Diameter −0.4% · Good fit
285/40R22 → 275/40R22
275/40R22
Diameter +1.0% · Good fit
275/40R22 → 285/40R22
275/40R22
Diameter −1.0% · Good fit
285/45R22 → 285/40R22
285/45R22
Diameter +3.6% · Marginal fit — proceed with care
285/45R21 → 285/40R22
285/45R21
Diameter +0.4% · Good fit
285/50R20 → 285/40R22
285/50R20
Diameter +0.8% · Good fit
255/55R20 → 285/40R22
255/55R20
Diameter +0.2% · Good fit
275/45R21 → 285/40R22
275/45R21
Diameter −0.7% · Good fit
265/55R20 → 285/40R22
265/55R20
Diameter +1.6% · Good fit
265/50R20 → 285/40R22
265/50R20
Diameter −1.8% · Good fit
265/45R21 → 285/40R22
265/45R21
Diameter −1.9% · Good fit
285/40R21 → 285/40R22
285/40R21
Diameter −3.2% · Marginal fit — proceed with care
275/50R21 → 285/40R22
275/50R21
Diameter +2.7% · Good fit
275/55R20 → 285/40R22
275/55R20
Diameter +3.0% · Marginal fit — proceed with care
255/50R20 → 285/40R22
255/50R20
Diameter −3.0% · Marginal fit — proceed with care
285/55R20 → 285/40R22
285/55R20
Diameter +4.4% · Marginal fit — proceed with care
285/40R22 → 285/45R22
285/45R22
Diameter −3.5% · Marginal fit — proceed with care
Common questions
- What is the overall diameter of a 285/40R22 tire?
- A 285/40R22 tire is about 30.98″ (787 mm) in overall diameter, with a sidewall height of 114.0 mm and a circumference of 97.32″.
- How many revolutions per mile does a 285/40R22 tire turn?
- A 285/40R22 turns roughly 651 revolutions per mile (405 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 285/40R22 mean?
- 285 is the tread width in millimetres, 40 is the aspect ratio — the sidewall height as a percentage of the tread width — and 22 is the wheel diameter in inches. So the sidewall is 285 × 40% = 114.0 mm tall.