Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/60-18 | 255/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.57 (751.2) | 29.04 (737.7) | -0.53 (-13.5) -1.8% |
| Width inches (mm) | 9.65 (245) | 10.04 (255) | 0.39 (10) 4.1% |
| Circum. inches (mm) | 92.91 (2359.96) | 91.24 (2317.55) | -1.67 (-42.41) -1.8% |
| Sidewall Height inches (mm) | 5.79 (147) | 5.52 (140.25) | -0.27 (-6.75) -4.6% |
| Revolutions per mile (km) | 681.94 (423.73) | 694.42 (431.49) | 12.48 (7.75) 1.8% |
255/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.64 mph (31.61 km/h) |
| 25 mph (40.23 km/h) | 24.55 mph (39.51 km/h) |
| 30 mph (48.28 km/h) | 29.46 mph (47.41 km/h) |
| 35 mph (56.33 km/h) | 34.37 mph (55.31 km/h) |
| 40 mph (64.37 km/h) | 39.28 mph (63.22 km/h) |
| 45 mph (72.42 km/h) | 44.19 mph (71.12 km/h) |
| 50 mph (80.47 km/h) | 49.1 mph (79.02 km/h) |
| 55 mph (88.51 km/h) | 54.01 mph (86.92 km/h) |
| 60 mph (96.56 km/h) | 58.92 mph (94.83 km/h) |
| 65 mph (104.61 km/h) | 63.83 mph (102.73 km/h) |
| 70 mph (112.65 km/h) | 68.74 mph (110.63 km/h) |
| 75 mph (120.7 km/h) | 73.65 mph (118.53 km/h) |
| 80 mph (128.75 km/h) | 78.56 mph (126.43 km/h) |
| 85 mph (136.79 km/h) | 83.47 mph (134.34 km/h) |
| 90 mph (144.84 km/h) | 88.38 mph (142.24 km/h) |
| 95 mph (152.89 km/h) | 93.29 mph (150.14 km/h) |
| 100 mph (160.93 km/h) | 98.2 mph (158.04 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1767 | 2053 | 2211 | 2309 | 2414 | 2489 | 2572 | 2670 | 2805 | 2940 | 3091 | 3211 | 3429 | 3670 | 3858 | 3978 | 4046 | 4294 | 4640 | 5392 |
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