Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/30-19 | 285/40-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.73 (653.6) | 27.98 (710.6) | 2.24 (57) 8.7% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 80.84 (2053.34) | 87.89 (2232.42) | 7.05 (179.07) 8.7% |
| Sidewall Height inches (mm) | 3.37 (85.5) | 4.49 (114) | 1.12 (28.5) 33.3% |
| Revolutions per mile (km) | 783.77 (487.01) | 720.9 (447.94) | -62.87 (-39.06) -8% |
285/40-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.74 mph (34.99 km/h) |
| 25 mph (40.23 km/h) | 27.18 mph (43.74 km/h) |
| 30 mph (48.28 km/h) | 32.62 mph (52.49 km/h) |
| 35 mph (56.33 km/h) | 38.05 mph (61.24 km/h) |
| 40 mph (64.37 km/h) | 43.49 mph (69.99 km/h) |
| 45 mph (72.42 km/h) | 48.92 mph (78.74 km/h) |
| 50 mph (80.47 km/h) | 54.36 mph (87.48 km/h) |
| 55 mph (88.51 km/h) | 59.8 mph (96.23 km/h) |
| 60 mph (96.56 km/h) | 65.23 mph (104.98 km/h) |
| 65 mph (104.61 km/h) | 70.67 mph (113.73 km/h) |
| 70 mph (112.65 km/h) | 76.1 mph (122.48 km/h) |
| 75 mph (120.7 km/h) | 81.54 mph (131.23 km/h) |
| 80 mph (128.75 km/h) | 86.98 mph (139.98 km/h) |
| 85 mph (136.79 km/h) | 92.41 mph (148.72 km/h) |
| 90 mph (144.84 km/h) | 97.85 mph (157.47 km/h) |
| 95 mph (152.89 km/h) | 103.28 mph (166.22 km/h) |
| 100 mph (160.93 km/h) | 108.72 mph (174.97 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1835 | 2131 | 2295 | 2397 | 2506 | 2584 | 2670 | 2771 | 2912 | 3052 | 3209 | 3333 | 3560 | 3810 | 4005 | 4130 | 4200 | 4458 | 4817 | 5597 |
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