The 185/65R15 is a common tire size for compact and economy vehicles such as Honda Fit, Toyota Yaris, and Kia Rio.
With a 120.3 mm sidewall (65% 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 -2.0% — a speedometer calibrated for 195/65R15 would read 102.1 km/h at an actual 100 km/h.
When replacing, verify that your wheel well can accommodate the 621.5 mm overall diameter. Keep speedometer deviation within ±3% for safety and legal compliance.
| Tire Code | 185/65R15 |
| Section Width | 185 mm |
| Aspect Ratio | 65% |
| Rim Diameter | 15" |
| Sidewall Height | 120.3 mm |
| Overall Diameter | 621.5 mm / 24.47" |
| Circumference | 1952.5 mm / 76.87" |
| Revolutions per km | 512.2 |
| Revolutions per mile | 824.2 |
| Tire Code | OD (mm) | Δ mm | Δ % | Speedo at 100 km/h |
|---|---|---|---|---|
| 185/60R15 | 603.0 | -18.5 | -3.0% | 103.1 |
| 175/65R15 | 608.5 | -13.0 | -2.1% | 102.1 |
| 185/65R15 (current) | 621.5 | — | — | 100.0 |
| 195/65R15 | 634.5 | +13.0 | +2.1% | 98.0 |
| 185/70R15 | 640.0 | +18.5 | +3.0% | 97.1 |