185/70R14 vs 195/55R16
Switching from 185/70R14 to 195/55R16 increases the overall diameter by 6.3 mm (1.0%). That is within the usual ±3% guideline.
| 185/70R14 | 195/55R16 | Difference (mm / revs) | |
|---|---|---|---|
| Section width | 185 mm | 195 mm | +10.0 |
| Sidewall height | 129.5 mm | 107.2 mm | -22.3 |
| Rim diameter | 355.6 mm | 406.4 mm | +50.8 |
| Overall diameter | 614.6 mm | 620.9 mm | +6.3 |
| Circumference | 1,930.8 mm | 1,950.6 mm | +19.8 |
| Revolutions | 518 per km | 513 per km | -5.0 |
Speedometer effect
With 195/55R16 fitted on a car calibrated for 185/70R14, the real speed when the speedometer shows:
| Speedometer shows | Actual speed |
|---|---|
| 50 km/h | 50.5 km/h |
| 80 km/h | 80.8 km/h |
| 100 km/h | 101.0 km/h |
| 120 km/h | 121.2 km/h |
Larger tires make the car go faster than the speedometer shows. Most speedometers also read slightly high from the factory.
Before you change size
- Check the sizes approved for your vehicle on the door-jamb placard or in the owner's manual.
- Check clearance to suspension, brakes and arches at full lock and full compression.
- Match or exceed the original load index and speed rating.
- Wider tires need an appropriate rim width; a 195 mm tire has a manufacturer-specified rim width range.
185/70R14 dimensions · 195/55R16 dimensions · Open in calculator