Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/35-18 | 255/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.2 (614.7) | 27.04 (686.7) | 2.83 (72) 11.7% |
| Width inches (mm) | 8.86 (225) | 10.04 (255) | 1.18 (30) 13.3% |
| Circum. inches (mm) | 76.03 (1931.14) | 84.93 (2157.33) | 8.91 (226.19) 11.7% |
| Sidewall Height inches (mm) | 3.1 (78.75) | 4.52 (114.75) | 1.42 (36) 45.7% |
| Revolutions per mile (km) | 833.37 (517.83) | 745.99 (463.53) | -87.38 (-54.29) -10.5% |
255/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 22.34 mph (35.96 km/h) |
| 25 mph (40.23 km/h) | 27.93 mph (44.95 km/h) |
| 30 mph (48.28 km/h) | 33.51 mph (53.94 km/h) |
| 35 mph (56.33 km/h) | 39.1 mph (62.92 km/h) |
| 40 mph (64.37 km/h) | 44.69 mph (71.91 km/h) |
| 45 mph (72.42 km/h) | 50.27 mph (80.9 km/h) |
| 50 mph (80.47 km/h) | 55.86 mph (89.89 km/h) |
| 55 mph (88.51 km/h) | 61.44 mph (98.88 km/h) |
| 60 mph (96.56 km/h) | 67.03 mph (107.87 km/h) |
| 65 mph (104.61 km/h) | 72.61 mph (116.86 km/h) |
| 70 mph (112.65 km/h) | 78.2 mph (125.85 km/h) |
| 75 mph (120.7 km/h) | 83.78 mph (134.84 km/h) |
| 80 mph (128.75 km/h) | 89.37 mph (143.83 km/h) |
| 85 mph (136.79 km/h) | 94.96 mph (152.82 km/h) |
| 90 mph (144.84 km/h) | 100.54 mph (161.81 km/h) |
| 95 mph (152.89 km/h) | 106.13 mph (170.8 km/h) |
| 100 mph (160.93 km/h) | 111.71 mph (179.79 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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