The 255/50R19 is a common tire size for SUVs and crossovers such as Toyota RAV4, Honda CR-V, and Ford Explorer.
With a 127.5 mm sidewall (50% aspect ratio), this tire offers a balanced blend of ride comfort and handling precision — versatile for both city driving and spirited cornering.
Compared to the baseline 245/40R19, this tire's overall diameter differs by +8.7% — a speedometer calibrated for 245/40R19 would read 92.0 km/h at an actual 100 km/h.
OE on the BMW X5 (E70 LCI 19") and various Porsche Cayenne 958 / Audi Q7 4L 19" packages. Load index 107V or 111W reinforced. Wheel width 8.0-9.5"; staggered front pairings are common on Porsche Cayenne Turbo variants.
Mainstream sedan sizes balance compound longevity against light all-season handling. When replacing, match the OE speed rating (H or V on most trims) — installing a lower rating voids many manufacturer load-test certifications and is illegal on autobahn-rated vehicles. Wheel-well clearance is rarely a concern at this rim diameter; speedometer drift across factory alternatives stays well inside the ±3% legal window.
| Tire Code | 255/50R19 |
| Section Width | 255 mm |
| Aspect Ratio | 50% |
| Rim Diameter | 19" |
| Sidewall Height | 127.5 mm |
| Overall Diameter | 737.6 mm / 29.04" |
| Circumference | 2317.2 mm / 91.23" |
| Revolutions per km | 431.5 |
| Revolutions per mile | 694.5 |
| Tire Code | OD (mm) | Δ mm | Δ % | Speedo at 100 km/h |
|---|---|---|---|---|
| 255/40R19 | 686.6 | -51.0 | -6.9% | 107.4 |
| 255/45R19 | 712.1 | -25.5 | -3.5% | 103.6 |
| 255/50R19 (current) | 737.6 | — | — | 100.0 |
| 265/50R19 | 747.6 | +10.0 | +1.4% | 98.7 |
| 255/50R20 | 763.0 | +25.4 | +3.4% | 96.7 |