Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/55-18 | 245/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.04 (737.7) | 28.61 (726.7) | -0.43 (-11) -1.5% |
| Width inches (mm) | 10.04 (255) | 9.65 (245) | -0.39 (-10) -3.9% |
| Circum. inches (mm) | 91.24 (2317.55) | 89.88 (2283) | -1.36 (-34.56) -1.5% |
| Sidewall Height inches (mm) | 5.52 (140.25) | 5.31 (134.75) | -0.22 (-5.5) -3.9% |
| Revolutions per mile (km) | 694.42 (431.49) | 704.93 (438.02) | 10.51 (6.53) 1.5% |
245/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.7 mph (31.71 km/h) |
| 25 mph (40.23 km/h) | 24.63 mph (39.63 km/h) |
| 30 mph (48.28 km/h) | 29.55 mph (47.56 km/h) |
| 35 mph (56.33 km/h) | 34.48 mph (55.49 km/h) |
| 40 mph (64.37 km/h) | 39.4 mph (63.41 km/h) |
| 45 mph (72.42 km/h) | 44.33 mph (71.34 km/h) |
| 50 mph (80.47 km/h) | 49.25 mph (79.27 km/h) |
| 55 mph (88.51 km/h) | 54.18 mph (87.19 km/h) |
| 60 mph (96.56 km/h) | 59.11 mph (95.12 km/h) |
| 65 mph (104.61 km/h) | 64.03 mph (103.05 km/h) |
| 70 mph (112.65 km/h) | 68.96 mph (110.97 km/h) |
| 75 mph (120.7 km/h) | 73.88 mph (118.9 km/h) |
| 80 mph (128.75 km/h) | 78.81 mph (126.83 km/h) |
| 85 mph (136.79 km/h) | 83.73 mph (134.75 km/h) |
| 90 mph (144.84 km/h) | 88.66 mph (142.68 km/h) |
| 95 mph (152.89 km/h) | 93.58 mph (150.61 km/h) |
| 100 mph (160.93 km/h) | 98.51 mph (158.53 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1794 | 2084 | 2244 | 2344 | 2450 | 2527 | 2611 | 2710 | 2847 | 2985 | 3137 | 3260 | 3481 | 3725 | 3916 | 4038 | 4107 | 4359 | 4710 | 5473 |
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