Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 250/40-18 | 250/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.87 (657.2) | 31.78 (807.2) | 5.91 (150) 22.8% |
| Width inches (mm) | 9.84 (250) | 9.84 (250) | 0 (0) 0% |
| Circum. inches (mm) | 81.29 (2064.65) | 99.84 (2535.89) | 18.55 (471.24) 22.8% |
| Sidewall Height inches (mm) | 3.94 (100) | 6.89 (175) | 2.95 (75) 75% |
| Revolutions per mile (km) | 779.47 (484.34) | 634.63 (394.34) | -144.85 (-90) -18.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 24.56 mph (39.53 km/h) |
| 25 mph (40.23 km/h) | 30.71 mph (49.42 km/h) |
| 30 mph (48.28 km/h) | 36.85 mph (59.3 km/h) |
| 35 mph (56.33 km/h) | 42.99 mph (69.18 km/h) |
| 40 mph (64.37 km/h) | 49.13 mph (79.07 km/h) |
| 45 mph (72.42 km/h) | 55.27 mph (88.95 km/h) |
| 50 mph (80.47 km/h) | 61.41 mph (98.83 km/h) |
| 55 mph (88.51 km/h) | 67.55 mph (108.72 km/h) |
| 60 mph (96.56 km/h) | 73.69 mph (118.6 km/h) |
| 65 mph (104.61 km/h) | 79.84 mph (128.48 km/h) |
| 70 mph (112.65 km/h) | 85.98 mph (138.37 km/h) |
| 75 mph (120.7 km/h) | 92.12 mph (148.25 km/h) |
| 80 mph (128.75 km/h) | 98.26 mph (158.13 km/h) |
| 85 mph (136.79 km/h) | 104.4 mph (168.02 km/h) |
| 90 mph (144.84 km/h) | 110.54 mph (177.9 km/h) |
| 95 mph (152.89 km/h) | 116.68 mph (187.78 km/h) |
| 100 mph (160.93 km/h) | 122.82 mph (197.67 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1615 | 1876 | 2020 | 2110 | 2206 | 2275 | 2350 | 2440 | 2563 | 2687 | 2825 | 2934 | 3134 | 3354 | 3526 | 3635 | 3697 | 3924 | 4240 | 4927 |
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