Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/40-19 | 285/30-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.98 (710.6) | 25.73 (653.6) | -2.24 (-57) -8% |
| Width inches (mm) | 11.22 (285) | 11.22 (285) | 0 (0) 0% |
| Circum. inches (mm) | 87.89 (2232.42) | 80.84 (2053.34) | -7.05 (-179.07) -8% |
| Sidewall Height inches (mm) | 4.49 (114) | 3.37 (85.5) | -1.12 (-28.5) -25% |
| Revolutions per mile (km) | 720.9 (447.94) | 783.77 (487.01) | 62.87 (39.06) 8.7% |
285/30-19 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.4 mph (29.61 km/h) |
| 25 mph (40.23 km/h) | 22.99 mph (37.01 km/h) |
| 30 mph (48.28 km/h) | 27.59 mph (44.41 km/h) |
| 35 mph (56.33 km/h) | 32.19 mph (51.81 km/h) |
| 40 mph (64.37 km/h) | 36.79 mph (59.21 km/h) |
| 45 mph (72.42 km/h) | 41.39 mph (66.61 km/h) |
| 50 mph (80.47 km/h) | 45.99 mph (74.01 km/h) |
| 55 mph (88.51 km/h) | 50.59 mph (81.41 km/h) |
| 60 mph (96.56 km/h) | 55.19 mph (88.82 km/h) |
| 65 mph (104.61 km/h) | 59.79 mph (96.22 km/h) |
| 70 mph (112.65 km/h) | 64.39 mph (103.62 km/h) |
| 75 mph (120.7 km/h) | 68.98 mph (111.02 km/h) |
| 80 mph (128.75 km/h) | 73.58 mph (118.42 km/h) |
| 85 mph (136.79 km/h) | 78.18 mph (125.82 km/h) |
| 90 mph (144.84 km/h) | 82.78 mph (133.22 km/h) |
| 95 mph (152.89 km/h) | 87.38 mph (140.62 km/h) |
| 100 mph (160.93 km/h) | 91.98 mph (148.03 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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