255/65R17
Overall diameter
30.05″
763 mm
Sidewall height
6.53″
165.8 mm
Tread width
255 mm
10.0″
Circumference
94.41″
7.9 ft
Revs per mile
671
417 per km
Wheel diameter
17″
aspect ratio 65%
Cross-section
- Overall diameter
- 30.05″
- Sidewall (each side)
- 6.53″
- Wheel
- 17″
255/65R17 compared with other sizes
All 32 practical swaps involving 255/65R17 — diameter change, speedometer impact and a fit verdict for each.
255/65R17 → 245/75R16
245/75R16
Diameter −1.4% · Good fit
255/65R17 → 265/70R17
265/70R17
Diameter −4.9% · Marginal fit — proceed with care
255/65R17 → 235/75R15
235/75R15
Diameter +4.1% · Marginal fit — proceed with care
255/65R17 → 265/70R15
265/70R15
Diameter +1.5% · Good fit
255/65R17 → 265/75R15
265/75R15
Diameter −2.0% · Good fit
255/65R17 → 255/70R16
255/70R16
Diameter −0.0% · Good fit
255/65R17 → 225/65R17
225/65R17
Diameter +5.4% · Not recommended
255/65R17 → 235/65R17
235/65R17
Diameter +3.5% · Marginal fit — proceed with care
255/65R17 → 245/65R17
245/65R17
Diameter +1.7% · Good fit
255/65R17 → 245/70R17
245/70R17
Diameter −1.5% · Good fit
255/65R17 → 245/75R17
245/75R17
Diameter −4.5% · Marginal fit — proceed with care
245/70R17 → 255/65R17
245/70R17
Diameter +1.5% · Good fit
265/65R17 → 255/65R17
265/65R17
Diameter +1.7% · Good fit
245/65R17 → 255/65R17
245/65R17
Diameter −1.7% · Good fit
255/70R17 → 255/65R17
255/70R17
Diameter +3.3% · Marginal fit — proceed with care
275/65R17 → 255/65R17
275/65R17
Diameter +3.4% · Marginal fit — proceed with care
235/65R17 → 255/65R17
235/65R17
Diameter −3.4% · Marginal fit — proceed with care
255/70R16 → 255/65R17
255/70R16
Diameter +0.0% · Good fit
255/60R18 → 255/65R17
255/60R18
Diameter −0.0% · Good fit
245/75R17 → 255/65R17
245/75R17
Diameter +4.7% · Marginal fit — proceed with care
235/65R18 → 255/65R17
235/65R18
Diameter −0.1% · Good fit
225/65R17 → 255/65R17
225/65R17
Diameter −5.1% · Not recommended
265/70R17 → 255/65R17
265/70R17
Diameter +5.2% · Not recommended
245/75R16 → 255/65R17
245/75R16
Diameter +1.4% · Good fit
265/55R19 → 255/65R17
265/55R19
Diameter +1.4% · Good fit
255/65R17 → 255/70R17
255/70R17
Diameter −3.2% · Marginal fit — proceed with care
255/65R17 → 265/65R17
265/65R17
Diameter −1.7% · Good fit
255/65R17 → 275/65R17
275/65R17
Diameter −3.3% · Marginal fit — proceed with care
255/65R17 → 235/65R18
235/65R18
Diameter +0.1% · Good fit
255/65R17 → 255/60R18
255/60R18
Diameter +0.0% · Good fit
255/65R17 → 265/55R19
265/55R19
Diameter −1.4% · Good fit
255/65R17 → 225/45R17
225/45R17
Diameter +20.3% · Not recommended
Common questions
- What is the overall diameter of a 255/65R17 tire?
- A 255/65R17 tire is about 30.05″ (763 mm) in overall diameter, with a sidewall height of 165.8 mm and a circumference of 94.41″.
- How many revolutions per mile does a 255/65R17 tire turn?
- A 255/65R17 turns roughly 671 revolutions per mile (417 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 255/65R17 mean?
- 255 is the tread width in millimetres, 65 is the aspect ratio — the sidewall height as a percentage of the tread width — and 17 is the wheel diameter in inches. So the sidewall is 255 × 65% = 165.8 mm tall.