255/70R16
A 255/70R16 tire is 30.06 inches tall and 10.0 inches wide, with a 7.03-inch sidewall, mounted on a 16-inch wheel.
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 in inches and millimeters
Every dimension of a 255/70R16, converted both ways. Calculated from the size code, accurate to about 1%.
| Measurement | Inches | Millimeters |
|---|---|---|
| Overall diameter (height) | 30.06″ | 763 mm |
| Tread width | 10.0″ | 255 mm |
| Sidewall height | 7.03″ | 178.5 mm |
| Wheel diameter | 16″ | 406 mm |
| Circumference | 94.42″ | 2398 mm |
Nominal dimensions from the size code. A real tire varies by a few millimeters between manufacturers, and a loaded tire sits slightly shorter than its free diameter.
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% · This fits
255/70R16 → 265/70R16
265/70R16
Diameter −1.8% · This fits
255/70R16 → 235/75R15
235/75R15
Diameter +4.1% · Borderline. Check clearance first
255/70R16 → 265/70R15
265/70R15
Diameter +1.5% · This fits
255/70R16 → 265/75R15
265/75R15
Diameter −1.9% · This fits
255/70R16 → 225/75R16
225/75R16
Diameter +2.6% · This fits
255/70R16 → 235/70R16
235/70R16
Diameter +3.8% · Borderline. Check clearance first
255/70R16 → 245/70R16
245/70R16
Diameter +1.9% · This fits
245/75R16 → 255/70R16
245/75R16
Diameter +1.4% · This fits
265/70R16 → 255/70R16
265/70R16
Diameter +1.8% · This fits
245/70R16 → 255/70R16
245/70R16
Diameter −1.8% · This fits
225/75R16 → 255/70R16
225/75R16
Diameter −2.6% · This fits
235/70R16 → 255/70R16
235/70R16
Diameter −3.7% · Borderline. Check clearance first
255/65R17 → 255/70R16
255/65R17
Diameter −0.0% · This fits
255/60R18 → 255/70R16
255/60R18
Diameter −0.0% · This fits
235/65R18 → 255/70R16
235/65R18
Diameter −0.1% · This fits
265/75R16 → 255/70R16
265/75R16
Diameter +5.3% · Too big a jump
245/70R17 → 255/70R16
245/70R17
Diameter +1.5% · This fits
265/70R15 → 255/70R16
265/70R15
Diameter −1.5% · This fits
265/60R18 → 255/70R16
265/60R18
Diameter +1.5% · This fits
245/60R18 → 255/70R16
245/60R18
Diameter −1.6% · This fits
245/65R18 → 255/70R16
245/65R18
Diameter +1.6% · This fits
255/70R16 → 265/75R16
265/75R16
Diameter −5.0% · Too big a jump
255/70R16 → 255/65R17
255/65R17
Diameter +0.0% · This fits
255/70R16 → 235/65R18
235/65R18
Diameter +0.1% · This fits
255/70R16 → 255/60R18
255/60R18
Diameter +0.0% · This fits
255/70R16 → 205/55R16
205/55R16
Diameter +20.8% · Too big a jump
Common questions
- What is 255/70R16 in inches?
- A 255/70R16 tire is 30.06 inches tall and 10.0 inches wide, with a 7.03-inch sidewall, mounted on a 16-inch wheel. In metric that is 763 mm tall and 255 mm wide. The circumference is 94.42 inches.
- How tall is a 255/70R16 tire?
- 30.06 inches, or 763 mm. That is the overall diameter, wheel included. It turns about 671 times per mile, which is what your speedometer counts.
- What do the numbers in 255/70R16 mean?
- 255 is the tread width in millimeters, 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.