The 185/70R15 is a common tire size for compact and economy vehicles such as Honda Fit, Toyota Yaris, and Kia Rio.
With a 129.5 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 +0.9% — a speedometer calibrated for 195/65R15 would read 99.1 km/h at an actual 100 km/h.
Standard on the Renault Kangoo van and various small light-commercial and economy chassis in Europe where tall-sidewall durability matters more than steering precision. Load index ranges 88T-92T with reinforced (RF) options for cargo duty. Tall sidewall is favored for unpaved-road durability and overloaded payload cycles.
Narrow profiles in this group emphasize ride comfort, rolling resistance and snow-chain compatibility over cornering grip. Owners replacing these sizes should prioritize tread-life and fuel-economy ratings on the EU label — UHP compounds add little value on platforms tuned for 95 km/h cruise speeds, and the extra rolling resistance shortens range.
| Tire Code | 185/70R15 |
| Section Width | 185 mm |
| Aspect Ratio | 70% |
| Rim Diameter | 15" |
| Sidewall Height | 129.5 mm |
| Overall Diameter | 640.0 mm / 25.20" |
| Circumference | 2010.6 mm / 79.16" |
| Revolutions per km | 497.4 |
| Revolutions per mile | 800.4 |
| Tire Code | OD (mm) | Δ mm | Δ % | Speedo at 100 km/h |
|---|---|---|---|---|
| 185/60R15 | 603.0 | -37.0 | -5.8% | 106.1 |
| 185/65R15 | 621.5 | -18.5 | -2.9% | 103.0 |
| 175/70R15 | 626.0 | -14.0 | -2.2% | 102.2 |
| 185/70R15 (current) | 640.0 | — | — | 100.0 |
| 195/70R15 | 654.0 | +14.0 | +2.2% | 97.9 |