Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/80-18 | 135/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.13 (689.2) | 26.5 (673.2) | -0.63 (-16) -2.3% |
| Width inches (mm) | 5.71 (145) | 5.31 (135) | -0.39 (-10) -6.9% |
| Circum. inches (mm) | 85.24 (2165.19) | 83.26 (2114.92) | -1.98 (-50.27) -2.3% |
| Sidewall Height inches (mm) | 4.57 (116) | 4.25 (108) | -0.31 (-8) -6.9% |
| Revolutions per mile (km) | 743.28 (461.85) | 760.95 (472.83) | 17.67 (10.98) 2.4% |
135/80-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.54 mph (31.44 km/h) |
| 25 mph (40.23 km/h) | 24.42 mph (39.3 km/h) |
| 30 mph (48.28 km/h) | 29.3 mph (47.16 km/h) |
| 35 mph (56.33 km/h) | 34.19 mph (55.02 km/h) |
| 40 mph (64.37 km/h) | 39.07 mph (62.88 km/h) |
| 45 mph (72.42 km/h) | 43.96 mph (70.74 km/h) |
| 50 mph (80.47 km/h) | 48.84 mph (78.6 km/h) |
| 55 mph (88.51 km/h) | 53.72 mph (86.46 km/h) |
| 60 mph (96.56 km/h) | 58.61 mph (94.32 km/h) |
| 65 mph (104.61 km/h) | 63.49 mph (102.18 km/h) |
| 70 mph (112.65 km/h) | 68.37 mph (110.04 km/h) |
| 75 mph (120.7 km/h) | 73.26 mph (117.9 km/h) |
| 80 mph (128.75 km/h) | 78.14 mph (125.76 km/h) |
| 85 mph (136.79 km/h) | 83.03 mph (133.62 km/h) |
| 90 mph (144.84 km/h) | 87.91 mph (141.48 km/h) |
| 95 mph (152.89 km/h) | 92.79 mph (149.34 km/h) |
| 100 mph (160.93 km/h) | 97.68 mph (157.2 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1936 | 2250 | 2423 | 2530 | 2645 | 2728 | 2818 | 2925 | 3074 | 3222 | 3387 | 3519 | 3758 | 4021 | 4227 | 4359 | 4433 | 4705 | 5084 | 5908 |
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