Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-18 | 245/60-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.13 (689.2) | 29.57 (751.2) | 2.44 (62) 9% |
| Width inches (mm) | 5.71 (145) | 9.65 (245) | 3.94 (100) 69% |
| Circum. inches (mm) | 85.24 (2165.19) | 92.91 (2359.96) | 7.67 (194.78) 9% |
| Sidewall Height inches (mm) | 4.57 (116) | 5.79 (147) | 1.22 (31) 26.7% |
| Revolutions per mile (km) | 743.28 (461.85) | 681.94 (423.73) | -61.35 (-38.12) -8.3% |
245/60-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.8 mph (35.08 km/h) |
| 25 mph (40.23 km/h) | 27.25 mph (43.85 km/h) |
| 30 mph (48.28 km/h) | 32.7 mph (52.62 km/h) |
| 35 mph (56.33 km/h) | 38.15 mph (61.39 km/h) |
| 40 mph (64.37 km/h) | 43.6 mph (70.16 km/h) |
| 45 mph (72.42 km/h) | 49.05 mph (78.94 km/h) |
| 50 mph (80.47 km/h) | 54.5 mph (87.71 km/h) |
| 55 mph (88.51 km/h) | 59.95 mph (96.48 km/h) |
| 60 mph (96.56 km/h) | 65.4 mph (105.25 km/h) |
| 65 mph (104.61 km/h) | 70.85 mph (114.02 km/h) |
| 70 mph (112.65 km/h) | 76.3 mph (122.79 km/h) |
| 75 mph (120.7 km/h) | 81.75 mph (131.56 km/h) |
| 80 mph (128.75 km/h) | 87.2 mph (140.33 km/h) |
| 85 mph (136.79 km/h) | 92.65 mph (149.1 km/h) |
| 90 mph (144.84 km/h) | 98.1 mph (157.87 km/h) |
| 95 mph (152.89 km/h) | 103.55 mph (166.64 km/h) |
| 100 mph (160.93 km/h) | 109 mph (175.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1735 | 2016 | 2171 | 2267 | 2370 | 2444 | 2526 | 2622 | 2754 | 2887 | 3035 | 3153 | 3367 | 3604 | 3788 | 3906 | 3973 | 4217 | 4556 | 5295 |
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