Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 210/40-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 25.72 (653.2) | 1.1 (28) 4.5% |
| Width inches (mm) | 8.27 (210) | 9.65 (245) | 1.38 (35) 16.7% |
| Circum. inches (mm) | 77.33 (1964.12) | 80.79 (2052.09) | 3.46 (87.96) 4.5% |
| Sidewall Height inches (mm) | 3.31 (84) | 3.86 (98) | 0.55 (14) 16.7% |
| Revolutions per mile (km) | 819.37 (509.13) | 784.25 (487.31) | -35.12 (-21.82) -4.3% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.9 mph (33.63 km/h) |
| 25 mph (40.23 km/h) | 26.12 mph (42.04 km/h) |
| 30 mph (48.28 km/h) | 31.34 mph (50.44 km/h) |
| 35 mph (56.33 km/h) | 36.57 mph (58.85 km/h) |
| 40 mph (64.37 km/h) | 41.79 mph (67.26 km/h) |
| 45 mph (72.42 km/h) | 47.02 mph (75.66 km/h) |
| 50 mph (80.47 km/h) | 52.24 mph (84.07 km/h) |
| 55 mph (88.51 km/h) | 57.46 mph (92.48 km/h) |
| 60 mph (96.56 km/h) | 62.69 mph (100.89 km/h) |
| 65 mph (104.61 km/h) | 67.91 mph (109.29 km/h) |
| 70 mph (112.65 km/h) | 73.13 mph (117.7 km/h) |
| 75 mph (120.7 km/h) | 78.36 mph (126.11 km/h) |
| 80 mph (128.75 km/h) | 83.58 mph (134.51 km/h) |
| 85 mph (136.79 km/h) | 88.81 mph (142.92 km/h) |
| 90 mph (144.84 km/h) | 94.03 mph (151.33 km/h) |
| 95 mph (152.89 km/h) | 99.25 mph (159.74 km/h) |
| 100 mph (160.93 km/h) | 104.48 mph (168.14 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1996 | 2318 | 2497 | 2607 | 2726 | 2811 | 2904 | 3015 | 3168 | 3321 | 3490 | 3626 | 3873 | 4144 | 4357 | 4493 | 4569 | 4849 | 5240 | 6089 |
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