The 175/70R15 is a common tire size for compact and economy vehicles such as Honda Fit, Toyota Yaris, and Kia Rio.
With a 122.5 mm sidewall (70% aspect ratio), this tire provides a smooth, cushioned ride that absorbs road imperfections well — ideal for daily commuting and highway cruising.
Compared to the baseline 195/65R15, this tire's overall diameter differs by -1.3% — a speedometer calibrated for 195/65R15 would read 101.4 km/h at an actual 100 km/h.
When replacing, verify that your wheel well can accommodate the 626.0 mm overall diameter. Keep speedometer deviation within ±3% for safety and legal compliance.
| Tire Code | 175/70R15 |
| Section Width | 175 mm |
| Aspect Ratio | 70% |
| Rim Diameter | 15" |
| Sidewall Height | 122.5 mm |
| Overall Diameter | 626.0 mm / 24.65" |
| Circumference | 1966.6 mm / 77.43" |
| Revolutions per km | 508.5 |
| Revolutions per mile | 818.3 |
| Tire Code | OD (mm) | Δ mm | Δ % | Speedo at 100 km/h |
|---|---|---|---|---|
| 175/65R15 | 608.5 | -17.5 | -2.8% | 102.9 |
| 175/70R15 (current) | 626.0 | — | — | 100.0 |
| 185/70R15 | 640.0 | +14.0 | +2.2% | 97.8 |
| 195/70R15 | 654.0 | +28.0 | +4.5% | 95.7 |