Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/35-18 | 255/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.75 (628.7) | 27.04 (686.7) | 2.28 (58) 9.2% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 77.76 (1975.12) | 84.93 (2157.33) | 7.17 (182.21) 9.2% |
| Sidewall Height inches (mm) | 3.38 (85.75) | 4.52 (114.75) | 1.14 (29) 33.8% |
| Revolutions per mile (km) | 814.81 (506.3) | 745.99 (463.53) | -68.82 (-42.76) -8.4% |
255/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.85 mph (35.16 km/h) |
| 25 mph (40.23 km/h) | 27.31 mph (43.95 km/h) |
| 30 mph (48.28 km/h) | 32.77 mph (52.73 km/h) |
| 35 mph (56.33 km/h) | 38.23 mph (61.52 km/h) |
| 40 mph (64.37 km/h) | 43.69 mph (70.31 km/h) |
| 45 mph (72.42 km/h) | 49.15 mph (79.1 km/h) |
| 50 mph (80.47 km/h) | 54.61 mph (87.89 km/h) |
| 55 mph (88.51 km/h) | 60.07 mph (96.68 km/h) |
| 60 mph (96.56 km/h) | 65.54 mph (105.47 km/h) |
| 65 mph (104.61 km/h) | 71 mph (114.26 km/h) |
| 70 mph (112.65 km/h) | 76.46 mph (123.05 km/h) |
| 75 mph (120.7 km/h) | 81.92 mph (131.84 km/h) |
| 80 mph (128.75 km/h) | 87.38 mph (140.63 km/h) |
| 85 mph (136.79 km/h) | 92.84 mph (149.41 km/h) |
| 90 mph (144.84 km/h) | 98.3 mph (158.2 km/h) |
| 95 mph (152.89 km/h) | 103.76 mph (166.99 km/h) |
| 100 mph (160.93 km/h) | 109.23 mph (175.78 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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