255/70R16
Overall diameter
30.06″
763 mm
Sidewall height
7.03″
178.5 mm
Tread width
255 mm
10.0″
Circumference
94.42″
7.9 ft
Revs per mile
671
417 per km
Wheel diameter
16″
aspect ratio 70%
Cross-section
- Overall diameter
- 30.06″
- Sidewall (each side)
- 7.03″
- Wheel
- 16″
255/70R16 compared with other sizes
All 27 practical swaps involving 255/70R16 — diameter change, speedometer impact and a fit verdict for each.
255/70R16 → 245/75R16
245/75R16
Diameter −1.4% · Good fit
255/70R16 → 265/70R16
265/70R16
Diameter −1.8% · Good fit
255/70R16 → 235/75R15
235/75R15
Diameter +4.1% · Marginal fit — proceed with care
255/70R16 → 265/70R15
265/70R15
Diameter +1.5% · Good fit
255/70R16 → 265/75R15
265/75R15
Diameter −1.9% · Good fit
255/70R16 → 225/75R16
225/75R16
Diameter +2.6% · Good fit
255/70R16 → 235/70R16
235/70R16
Diameter +3.8% · Marginal fit — proceed with care
255/70R16 → 245/70R16
245/70R16
Diameter +1.9% · Good fit
245/75R16 → 255/70R16
245/75R16
Diameter +1.4% · Good fit
265/70R16 → 255/70R16
265/70R16
Diameter +1.8% · Good fit
245/70R16 → 255/70R16
245/70R16
Diameter −1.8% · Good fit
225/75R16 → 255/70R16
225/75R16
Diameter −2.6% · Good fit
235/70R16 → 255/70R16
235/70R16
Diameter −3.7% · Marginal fit — proceed with care
255/65R17 → 255/70R16
255/65R17
Diameter −0.0% · Good fit
255/60R18 → 255/70R16
255/60R18
Diameter −0.0% · Good fit
235/65R18 → 255/70R16
235/65R18
Diameter −0.1% · Good fit
265/75R16 → 255/70R16
265/75R16
Diameter +5.3% · Not recommended
245/70R17 → 255/70R16
245/70R17
Diameter +1.5% · Good fit
265/70R15 → 255/70R16
265/70R15
Diameter −1.5% · Good fit
265/60R18 → 255/70R16
265/60R18
Diameter +1.5% · Good fit
245/60R18 → 255/70R16
245/60R18
Diameter −1.6% · Good fit
245/65R18 → 255/70R16
245/65R18
Diameter +1.6% · Good fit
255/70R16 → 265/75R16
265/75R16
Diameter −5.0% · Not recommended
255/70R16 → 255/65R17
255/65R17
Diameter +0.0% · Good fit
255/70R16 → 235/65R18
235/65R18
Diameter +0.1% · Good fit
255/70R16 → 255/60R18
255/60R18
Diameter +0.0% · Good fit
255/70R16 → 205/55R16
205/55R16
Diameter +20.8% · Not recommended
Common questions
- What is the overall diameter of a 255/70R16 tire?
- A 255/70R16 tire is about 30.06″ (763 mm) in overall diameter, with a sidewall height of 178.5 mm and a circumference of 94.42″.
- How many revolutions per mile does a 255/70R16 tire turn?
- A 255/70R16 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 255/70R16 mean?
- 255 is the tread width in millimetres, 70 is the aspect ratio — the sidewall height as a percentage of the tread width — and 16 is the wheel diameter in inches. So the sidewall is 255 × 70% = 178.5 mm tall.