Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/35-18 | 255/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.51 (698.7) | 27.04 (686.7) | -0.47 (-12) -1.7% |
| Width inches (mm) | 13.58 (345) | 10.04 (255) | -3.54 (-90) -26.1% |
| Circum. inches (mm) | 86.42 (2195.03) | 84.93 (2157.33) | -1.48 (-37.7) -1.7% |
| Sidewall Height inches (mm) | 4.75 (120.75) | 4.52 (114.75) | -0.24 (-6) -5% |
| Revolutions per mile (km) | 733.18 (455.57) | 745.99 (463.53) | 12.81 (7.96) 1.7% |
255/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.66 mph (31.63 km/h) |
| 25 mph (40.23 km/h) | 24.57 mph (39.54 km/h) |
| 30 mph (48.28 km/h) | 29.48 mph (47.45 km/h) |
| 35 mph (56.33 km/h) | 34.4 mph (55.36 km/h) |
| 40 mph (64.37 km/h) | 39.31 mph (63.27 km/h) |
| 45 mph (72.42 km/h) | 44.23 mph (71.18 km/h) |
| 50 mph (80.47 km/h) | 49.14 mph (79.09 km/h) |
| 55 mph (88.51 km/h) | 54.06 mph (86.99 km/h) |
| 60 mph (96.56 km/h) | 58.97 mph (94.9 km/h) |
| 65 mph (104.61 km/h) | 63.88 mph (102.81 km/h) |
| 70 mph (112.65 km/h) | 68.8 mph (110.72 km/h) |
| 75 mph (120.7 km/h) | 73.71 mph (118.63 km/h) |
| 80 mph (128.75 km/h) | 78.63 mph (126.54 km/h) |
| 85 mph (136.79 km/h) | 83.54 mph (134.45 km/h) |
| 90 mph (144.84 km/h) | 88.45 mph (142.35 km/h) |
| 95 mph (152.89 km/h) | 93.37 mph (150.26 km/h) |
| 100 mph (160.93 km/h) | 98.28 mph (158.17 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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