Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 215/45-18 | 245/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.62 (650.7) | 25.72 (653.2) | 0.1 (2.5) 0.4% |
| Width inches (mm) | 8.46 (215) | 9.65 (245) | 1.18 (30) 14% |
| Circum. inches (mm) | 80.48 (2044.23) | 80.79 (2052.09) | 0.31 (7.85) 0.4% |
| Sidewall Height inches (mm) | 3.81 (96.75) | 3.86 (98) | 0.05 (1.25) 1.3% |
| Revolutions per mile (km) | 787.26 (489.18) | 784.25 (487.31) | -3.01 (-1.87) -0.4% |
245/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.08 mph (32.31 km/h) |
| 25 mph (40.23 km/h) | 25.1 mph (40.39 km/h) |
| 30 mph (48.28 km/h) | 30.12 mph (48.47 km/h) |
| 35 mph (56.33 km/h) | 35.13 mph (56.54 km/h) |
| 40 mph (64.37 km/h) | 40.15 mph (64.62 km/h) |
| 45 mph (72.42 km/h) | 45.17 mph (72.7 km/h) |
| 50 mph (80.47 km/h) | 50.19 mph (80.78 km/h) |
| 55 mph (88.51 km/h) | 55.21 mph (88.85 km/h) |
| 60 mph (96.56 km/h) | 60.23 mph (96.93 km/h) |
| 65 mph (104.61 km/h) | 65.25 mph (105.01 km/h) |
| 70 mph (112.65 km/h) | 70.27 mph (113.09 km/h) |
| 75 mph (120.7 km/h) | 75.29 mph (121.16 km/h) |
| 80 mph (128.75 km/h) | 80.31 mph (129.24 km/h) |
| 85 mph (136.79 km/h) | 85.33 mph (137.32 km/h) |
| 90 mph (144.84 km/h) | 90.35 mph (145.4 km/h) |
| 95 mph (152.89 km/h) | 95.36 mph (153.48 km/h) |
| 100 mph (160.93 km/h) | 100.38 mph (161.55 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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