Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/45-18 | 255/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.68 (677.7) | 27.04 (686.7) | 0.35 (9) 1.3% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 83.82 (2129.06) | 84.93 (2157.33) | 1.11 (28.27) 1.3% |
| Sidewall Height inches (mm) | 4.34 (110.25) | 4.52 (114.75) | 0.18 (4.5) 4.1% |
| Revolutions per mile (km) | 755.9 (469.69) | 745.99 (463.53) | -9.91 (-6.16) -1.3% |
255/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.27 mph (32.61 km/h) |
| 25 mph (40.23 km/h) | 25.33 mph (40.77 km/h) |
| 30 mph (48.28 km/h) | 30.4 mph (48.92 km/h) |
| 35 mph (56.33 km/h) | 35.46 mph (57.08 km/h) |
| 40 mph (64.37 km/h) | 40.53 mph (65.23 km/h) |
| 45 mph (72.42 km/h) | 45.6 mph (73.38 km/h) |
| 50 mph (80.47 km/h) | 50.66 mph (81.54 km/h) |
| 55 mph (88.51 km/h) | 55.73 mph (89.69 km/h) |
| 60 mph (96.56 km/h) | 60.8 mph (97.84 km/h) |
| 65 mph (104.61 km/h) | 65.86 mph (106 km/h) |
| 70 mph (112.65 km/h) | 70.93 mph (114.15 km/h) |
| 75 mph (120.7 km/h) | 76 mph (122.3 km/h) |
| 80 mph (128.75 km/h) | 81.06 mph (130.46 km/h) |
| 85 mph (136.79 km/h) | 86.13 mph (138.61 km/h) |
| 90 mph (144.84 km/h) | 91.2 mph (146.76 km/h) |
| 95 mph (152.89 km/h) | 96.26 mph (154.92 km/h) |
| 100 mph (160.93 km/h) | 101.33 mph (163.07 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1898 | 2205 | 2375 | 2480 | 2593 | 2674 | 2763 | 2868 | 3013 | 3159 | 3320 | 3449 | 3684 | 3942 | 4144 | 4273 | 4346 | 4613 | 4984 | 5792 |
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