Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 185/65-18 | 285/30-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.47 (697.7) | 25.73 (653.6) | -1.74 (-44.1) -6.3% |
| Width inches (mm) | 7.28 (185) | 11.22 (285) | 3.94 (100) 54.1% |
| Circum. inches (mm) | 86.29 (2191.89) | 80.84 (2053.34) | -5.45 (-138.54) -6.3% |
| Sidewall Height inches (mm) | 4.73 (120.25) | 3.37 (85.5) | -1.37 (-34.75) -28.9% |
| Revolutions per mile (km) | 734.23 (456.23) | 783.77 (487.01) | 49.54 (30.78) 6.7% |
285/30-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.74 mph (30.15 km/h) |
| 25 mph (40.23 km/h) | 23.42 mph (37.69 km/h) |
| 30 mph (48.28 km/h) | 28.1 mph (45.23 km/h) |
| 35 mph (56.33 km/h) | 32.79 mph (52.77 km/h) |
| 40 mph (64.37 km/h) | 37.47 mph (60.3 km/h) |
| 45 mph (72.42 km/h) | 42.16 mph (67.84 km/h) |
| 50 mph (80.47 km/h) | 46.84 mph (75.38 km/h) |
| 55 mph (88.51 km/h) | 51.52 mph (82.92 km/h) |
| 60 mph (96.56 km/h) | 56.21 mph (90.46 km/h) |
| 65 mph (104.61 km/h) | 60.89 mph (98 km/h) |
| 70 mph (112.65 km/h) | 65.58 mph (105.53 km/h) |
| 75 mph (120.7 km/h) | 70.26 mph (113.07 km/h) |
| 80 mph (128.75 km/h) | 74.94 mph (120.61 km/h) |
| 85 mph (136.79 km/h) | 79.63 mph (128.15 km/h) |
| 90 mph (144.84 km/h) | 84.31 mph (135.69 km/h) |
| 95 mph (152.89 km/h) | 89 mph (143.22 km/h) |
| 100 mph (160.93 km/h) | 93.68 mph (150.76 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1995 | 2317 | 2495 | 2606 | 2724 | 2809 | 2903 | 3013 | 3166 | 3319 | 3488 | 3624 | 3870 | 4142 | 4354 | 4490 | 4566 | 4846 | 5237 | 6085 |
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