Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 210/40-18 | 245/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.61 (625.2) | 26.68 (677.7) | 2.07 (52.5) 8.4% |
| Width inches (mm) | 8.27 (210) | 9.65 (245) | 1.38 (35) 16.7% |
| Circum. inches (mm) | 77.33 (1964.12) | 83.82 (2129.06) | 6.49 (164.93) 8.4% |
| Sidewall Height inches (mm) | 3.31 (84) | 4.34 (110.25) | 1.03 (26.25) 31.3% |
| Revolutions per mile (km) | 819.37 (509.13) | 755.9 (469.69) | -63.47 (-39.44) -7.7% |
245/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.68 mph (34.89 km/h) |
| 25 mph (40.23 km/h) | 27.1 mph (43.61 km/h) |
| 30 mph (48.28 km/h) | 32.52 mph (52.33 km/h) |
| 35 mph (56.33 km/h) | 37.94 mph (61.06 km/h) |
| 40 mph (64.37 km/h) | 43.36 mph (69.78 km/h) |
| 45 mph (72.42 km/h) | 48.78 mph (78.5 km/h) |
| 50 mph (80.47 km/h) | 54.2 mph (87.22 km/h) |
| 55 mph (88.51 km/h) | 59.62 mph (95.95 km/h) |
| 60 mph (96.56 km/h) | 65.04 mph (104.67 km/h) |
| 65 mph (104.61 km/h) | 70.46 mph (113.39 km/h) |
| 70 mph (112.65 km/h) | 75.88 mph (122.11 km/h) |
| 75 mph (120.7 km/h) | 81.3 mph (130.84 km/h) |
| 80 mph (128.75 km/h) | 86.72 mph (139.56 km/h) |
| 85 mph (136.79 km/h) | 92.14 mph (148.28 km/h) |
| 90 mph (144.84 km/h) | 97.56 mph (157 km/h) |
| 95 mph (152.89 km/h) | 102.98 mph (165.73 km/h) |
| 100 mph (160.93 km/h) | 108.4 mph (174.45 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1924 | 2235 | 2407 | 2513 | 2628 | 2709 | 2799 | 2906 | 3053 | 3201 | 3364 | 3495 | 3733 | 3995 | 4199 | 4330 | 4404 | 4674 | 5050 | 5869 |
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