265/65R18
Overall diameter
31.56″
802 mm
Sidewall height
6.78″
172.3 mm
Tread width
265 mm
10.4″
Circumference
99.16″
8.3 ft
Revs per mile
639
397 per km
Wheel diameter
18″
aspect ratio 65%
Cross-section
- Overall diameter
- 31.56″
- Sidewall (each side)
- 6.78″
- Wheel
- 18″
265/65R18 compared with other sizes
All 35 practical swaps involving 265/65R18 — diameter change, speedometer impact and a fit verdict for each.
265/65R18 → 265/70R17
265/70R17
Diameter −0.1% · Good fit
265/65R18 → 265/60R18
265/60R18
Diameter +3.4% · Marginal fit — proceed with care
265/65R18 → 265/75R16
265/75R16
Diameter −0.3% · Good fit
265/65R18 → 235/80R17
235/80R17
Diameter −0.8% · Good fit
265/65R18 → 245/75R17
245/75R17
Diameter +0.3% · Good fit
265/65R18 → 255/75R17
255/75R17
Diameter −1.5% · Good fit
265/65R18 → 305/65R17
305/65R17
Diameter −3.2% · Marginal fit — proceed with care
265/65R18 → 235/65R18
235/65R18
Diameter +5.1% · Not recommended
265/65R18 → 245/65R18
245/65R18
Diameter +3.4% · Marginal fit — proceed with care
265/65R18 → 255/60R18
255/60R18
Diameter +5.0% · Not recommended
265/65R18 → 255/65R18
255/65R18
Diameter +1.6% · Good fit
265/65R18 → 255/70R18
255/70R18
Diameter −1.5% · Good fit
285/60R18 → 265/65R18
285/60R18
Diameter −0.3% · Good fit
255/70R18 → 265/65R18
255/70R18
Diameter +1.6% · Good fit
255/65R18 → 265/65R18
255/65R18
Diameter −1.6% · Good fit
275/65R18 → 265/65R18
275/65R18
Diameter +1.6% · Good fit
275/60R18 → 265/65R18
275/60R18
Diameter −1.8% · Good fit
265/60R18 → 265/65R18
265/60R18
Diameter −3.3% · Marginal fit — proceed with care
265/70R18 → 265/65R18
265/70R18
Diameter +3.3% · Marginal fit — proceed with care
305/60R18 → 265/65R18
305/60R18
Diameter +2.7% · Good fit
245/65R18 → 265/65R18
245/65R18
Diameter −3.2% · Marginal fit — proceed with care
285/65R18 → 265/65R18
285/65R18
Diameter +3.2% · Marginal fit — proceed with care
265/70R17 → 265/65R18
265/70R17
Diameter +0.1% · Good fit
265/75R16 → 265/65R18
265/75R16
Diameter +0.3% · Good fit
265/55R20 → 265/65R18
265/55R20
Diameter −0.3% · Good fit
255/60R18 → 265/65R18
255/60R18
Diameter −4.8% · Marginal fit — proceed with care
265/65R18 → 265/70R18
265/70R18
Diameter −3.2% · Marginal fit — proceed with care
265/65R18 → 275/60R18
275/60R18
Diameter +1.8% · Good fit
265/65R18 → 275/65R18
275/65R18
Diameter −1.6% · Good fit
265/65R18 → 275/70R18
275/70R18
Diameter −4.8% · Marginal fit — proceed with care
265/65R18 → 285/60R18
285/60R18
Diameter +0.3% · Good fit
265/65R18 → 285/65R18
285/65R18
Diameter −3.1% · Marginal fit — proceed with care
265/65R18 → 305/60R18
305/60R18
Diameter −2.6% · Good fit
265/65R18 → 265/55R20
265/55R20
Diameter +0.3% · Good fit
265/65R18 → 235/45R18
235/45R18
Diameter +19.9% · Not recommended
Common questions
- What is the overall diameter of a 265/65R18 tire?
- A 265/65R18 tire is about 31.56″ (802 mm) in overall diameter, with a sidewall height of 172.3 mm and a circumference of 99.16″.
- How many revolutions per mile does a 265/65R18 tire turn?
- A 265/65R18 turns roughly 639 revolutions per mile (397 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 265/65R18 mean?
- 265 is the tread width in millimetres, 65 is the aspect ratio — the sidewall height as a percentage of the tread width — and 18 is the wheel diameter in inches. So the sidewall is 265 × 65% = 172.3 mm tall.