255/75R17
Overall diameter
32.06″
814 mm
Sidewall height
7.53″
191.3 mm
Tread width
255 mm
10.0″
Circumference
100.72″
8.4 ft
Revs per mile
629
391 per km
Wheel diameter
17″
aspect ratio 75%
Cross-section
- Overall diameter
- 32.06″
- Sidewall (each side)
- 7.53″
- Wheel
- 17″
255/75R17 compared with other sizes
All 28 practical swaps involving 255/75R17 — diameter change, speedometer impact and a fit verdict for each.
255/75R17 → 265/70R17
265/70R17
Diameter +1.4% · Good fit
255/75R17 → 265/75R16
265/75R16
Diameter +1.3% · Good fit
255/75R17 → 285/75R16
285/75R16
Diameter −2.4% · Good fit
255/75R17 → 235/80R17
235/80R17
Diameter +0.8% · Good fit
255/75R17 → 245/70R17
245/70R17
Diameter +5.1% · Not recommended
255/75R17 → 245/75R17
245/75R17
Diameter +1.9% · Good fit
255/75R17 → 255/70R17
255/70R17
Diameter +3.2% · Marginal fit — proceed with care
275/70R17 → 255/75R17
275/70R17
Diameter +0.3% · Good fit
235/80R17 → 255/75R17
235/80R17
Diameter −0.8% · Good fit
265/70R17 → 255/75R17
265/70R17
Diameter −1.4% · Good fit
245/75R17 → 255/75R17
245/75R17
Diameter −1.8% · Good fit
255/70R17 → 255/75R17
255/70R17
Diameter −3.1% · Marginal fit — proceed with care
285/70R17 → 255/75R17
285/70R17
Diameter +2.0% · Good fit
275/65R17 → 255/75R17
275/65R17
Diameter −3.1% · Marginal fit — proceed with care
255/70R18 → 255/75R17
255/70R18
Diameter −0.0% · Good fit
265/65R17 → 255/75R17
265/65R17
Diameter −4.7% · Marginal fit — proceed with care
245/70R17 → 255/75R17
245/70R17
Diameter −4.9% · Marginal fit — proceed with care
275/65R18 → 255/75R17
275/65R18
Diameter +0.0% · Good fit
265/75R16 → 255/75R17
265/75R16
Diameter −1.3% · Good fit
265/65R18 → 255/75R17
265/65R18
Diameter −1.5% · Good fit
285/65R18 → 255/75R17
285/65R18
Diameter +1.6% · Good fit
255/75R17 → 265/65R17
265/65R17
Diameter +4.9% · Marginal fit — proceed with care
255/75R17 → 275/65R17
275/65R17
Diameter +3.2% · Marginal fit — proceed with care
255/75R17 → 275/70R17
275/70R17
Diameter −0.3% · Good fit
255/75R17 → 285/70R17
285/70R17
Diameter −2.0% · Good fit
255/75R17 → 255/70R18
255/70R18
Diameter +0.0% · Good fit
255/75R17 → 275/65R18
275/65R18
Diameter −0.0% · Good fit
255/75R17 → 225/45R17
225/45R17
Diameter +28.4% · Not recommended
Common questions
- What is the overall diameter of a 255/75R17 tire?
- A 255/75R17 tire is about 32.06″ (814 mm) in overall diameter, with a sidewall height of 191.3 mm and a circumference of 100.72″.
- How many revolutions per mile does a 255/75R17 tire turn?
- A 255/75R17 turns roughly 629 revolutions per mile (391 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 255/75R17 mean?
- 255 is the tread width in millimetres, 75 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 × 75% = 191.3 mm tall.