255/70R17
Common fitments: Tacoma, Frontier, Colorado
Overall diameter
31.06″
789 mm
Sidewall height
7.03″
178.5 mm
Tread width
255 mm
10.0″
Circumference
97.56″
8.1 ft
Revs per mile
649
404 per km
Wheel diameter
17″
aspect ratio 70%
Cross-section
- Overall diameter
- 31.06″
- Sidewall (each side)
- 7.03″
- Wheel
- 17″
255/70R17 compared with other sizes
All 31 practical swaps involving 255/70R17 — diameter change, speedometer impact and a fit verdict for each.
255/70R17 → 265/70R16
265/70R16
Diameter +1.5% · Good fit
255/70R17 → 265/70R17
265/70R17
Diameter −1.7% · Good fit
255/70R17 → 265/75R15
265/75R15
Diameter +1.3% · Good fit
255/70R17 → 235/80R17
235/80R17
Diameter −2.4% · Good fit
255/70R17 → 245/65R17
245/65R17
Diameter +5.1% · Not recommended
255/70R17 → 245/70R17
245/70R17
Diameter +1.8% · Good fit
255/70R17 → 245/75R17
245/75R17
Diameter −1.3% · Good fit
255/70R17 → 255/65R17
255/65R17
Diameter +3.3% · Marginal fit — proceed with care
275/65R17 → 255/70R17
275/65R17
Diameter +0.1% · Good fit
245/75R17 → 255/70R17
245/75R17
Diameter +1.3% · Good fit
265/65R17 → 255/70R17
265/65R17
Diameter −1.6% · Good fit
265/70R17 → 255/70R17
265/70R17
Diameter +1.8% · Good fit
245/70R17 → 255/70R17
245/70R17
Diameter −1.8% · Good fit
255/65R17 → 255/70R17
255/65R17
Diameter −3.2% · Marginal fit — proceed with care
255/75R17 → 255/70R17
255/75R17
Diameter +3.2% · Marginal fit — proceed with care
235/80R17 → 255/70R17
235/80R17
Diameter +2.4% · Good fit
275/70R17 → 255/70R17
275/70R17
Diameter +3.5% · Marginal fit — proceed with care
255/65R18 → 255/70R17
255/65R18
Diameter −0.0% · Good fit
255/60R19 → 255/70R17
255/60R19
Diameter −0.0% · Good fit
245/65R17 → 255/70R17
245/65R17
Diameter −4.9% · Marginal fit — proceed with care
275/60R18 → 255/70R17
275/60R18
Diameter −0.2% · Good fit
285/70R17 → 255/70R17
285/70R17
Diameter +5.3% · Not recommended
255/70R17 → 255/75R17
255/75R17
Diameter −3.1% · Marginal fit — proceed with care
255/70R17 → 265/65R17
265/65R17
Diameter +1.6% · Good fit
255/70R17 → 275/65R17
275/65R17
Diameter −0.1% · Good fit
255/70R17 → 275/70R17
275/70R17
Diameter −3.4% · Marginal fit — proceed with care
255/70R17 → 285/70R17
285/70R17
Diameter −5.1% · Not recommended
255/70R17 → 255/65R18
255/65R18
Diameter +0.0% · Good fit
255/70R17 → 255/60R19
255/60R19
Diameter +0.0% · Good fit
255/70R17 → 275/55R19
275/55R19
Diameter +0.5% · Good fit
255/70R17 → 225/45R17
225/45R17
Diameter +24.4% · Not recommended
Common questions
- What is the overall diameter of a 255/70R17 tire?
- A 255/70R17 tire is about 31.06″ (789 mm) in overall diameter, with a sidewall height of 178.5 mm and a circumference of 97.56″.
- How many revolutions per mile does a 255/70R17 tire turn?
- A 255/70R17 turns roughly 649 revolutions per mile (404 per kilometre). This is the number that determines speedometer and odometer accuracy when you change tire size.
- What do the numbers in 255/70R17 mean?
- 255 is the tread width in millimetres, 70 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 × 70% = 178.5 mm tall.