Tire size in inches and millimeters
185/70R14 tire size in inches
A 185/70R14 tire is 24.20 inches tall (614.6 mm) and 7.28 inches wide (185 mm), with a 5.10-inch sidewall (129.5 mm). In inch notation that is about 24.2x7.3R14, close to a 24-inch tire (nominal).
Its circumference is 76.02 inches (1,930.8 mm), or about 834 revolutions per mile.
Nominal 185/70R14 dimensions
- Overall diameter
- 24.20 in614.6 mm
- Section width
- 7.28 in185 mm
- Sidewall height
- 5.10 in129.5 mm
- Circumference
- 76.02 in1,930.8 mm
- Rim diameter
- 14 in
- Revolutions per mile
- 834nominal, from geometric circumference
- Inch notation
- 24.2x7.3R14approximate
Where 185/70R14 fits
- Inch class: 24.20 in is 0.20 in more than a true 24 inches, inside the 24-inch class (23.50 to 24.49 in).
- Profile: the 14-inch rim plus two 5.10 in sidewalls make up the overall diameter, and the sidewalls are 42% of it. At 70 series that is a tall profile: the extra sidewall absorbs more of each bump and flexes more in corners.
- Same 14-inch rim: 185/70R14 is the shortest 14-inch size in the catalog. The next taller is 205/75R14 (26.11 in, +7.89%).
- Same 185 mm width: 185/65R15 (24.47 in, +1.12%). At the same width, a different profile or rim changes sidewall height and overall diameter, not section width.
Reading the marking: 185 is the section width in millimeters, 70 is the sidewall height as a percentage of that width, and R14 means radial construction for a 14-inch rim. Percentages are measured from 185/70R14.
Similar sizes on other rim diameters
Within 3% of 185/70R14's overall diameter, nearest first. The speed column is the actual speed when a speedometer calibrated for 185/70R14 reads 60 mph.
| Size | Overall diameter | Diameter change | At 60 mph indicated | Compare |
|---|---|---|---|---|
| 195/60R15 | 24.21 in | +0.07% | 60.04 mph | Comparison page for 185/70R14 vs 195/60R15 |
| 205/50R16 | 24.07 in | -0.52% | 59.69 mph | No comparison page |
| 195/55R16 | 24.44 in | +1.03% | 60.62 mph | No comparison page |
| 185/65R15 | 24.47 in | +1.12% | 60.67 mph | No comparison page |
| 215/45R17 | 24.62 in | +1.74% | 61.04 mph | No comparison page |
| 205/60R15 | 24.69 in | +2.02% | 61.21 mph | No comparison page |
For a size without a comparison page, open 185/70R14 in the calculator and enter that size as the proposed tire.
Important: These results compare nominal dimensions. They do not confirm vehicle fitment. Actual clearance varies by tire model, approved rim width, wheel construction, suspension, alignment, body tolerances, steering angle, load, and brake geometry. Verify load and speed ratings and physically test-fit the complete setup before driving.
Physical checks before changing size
- Approved rim-width range for the exact tire model
- Load index and speed rating equal to or greater than vehicle requirements
- Brake-caliper, hub, and wheel-fastener compatibility
- Fender, liner, suspension, and full-lock steering clearance
- Clearance at full compression and under expected load
- Alignment, tire pressure, and manufacturer guidance
- Professional inspection when variance or clearance is uncertain
Compare another setup
See diameter, speedometer, ride-height, and wheel-position changes.
The calculator opens with 185/70R14 as the current tire and 195/60R15, the published comparison closest in overall diameter, as the proposed tire. Change either size; wheel details stay unknown until you supply them.
Compare 185/70R14 with 195/60R15 in the calculatorPublished comparisons for 185/70R14
None keeps the 14-inch rim; each one changes wheel diameter. Diameter changes are measured from 185/70R14.
Larger wheels (plus sizing)
- 185/70R14 vs 195/60R15 +0.07% diameter
Size source and limits
Listed as a recorded tire size (source: NHTSA consumer-complaint records through May 2021, checked August 19, 2026; see methodology). A recorded size is not a safety, popularity, availability, or fitment rating.
Read the formulas and source policy. Read the editorial and corrections policy.