Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 135/80-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 26.5 (673.2) | -0.04 (-1) -0.1% |
| Width inches (mm) | 6.1 (155) | 5.31 (135) | -0.79 (-20) -12.9% |
| Circum. inches (mm) | 83.39 (2118.06) | 83.26 (2114.92) | -0.12 (-3.14) -0.1% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.25 (108) | -0.02 (-0.5) -0.5% |
| Revolutions per mile (km) | 759.82 (472.13) | 760.95 (472.83) | 1.13 (0.7) 0.1% |
135/80-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.97 mph (32.14 km/h) |
| 25 mph (40.23 km/h) | 24.96 mph (40.17 km/h) |
| 30 mph (48.28 km/h) | 29.96 mph (48.21 km/h) |
| 35 mph (56.33 km/h) | 34.95 mph (56.24 km/h) |
| 40 mph (64.37 km/h) | 39.94 mph (64.28 km/h) |
| 45 mph (72.42 km/h) | 44.93 mph (72.31 km/h) |
| 50 mph (80.47 km/h) | 49.93 mph (80.35 km/h) |
| 55 mph (88.51 km/h) | 54.92 mph (88.38 km/h) |
| 60 mph (96.56 km/h) | 59.91 mph (96.42 km/h) |
| 65 mph (104.61 km/h) | 64.9 mph (104.45 km/h) |
| 70 mph (112.65 km/h) | 69.9 mph (112.49 km/h) |
| 75 mph (120.7 km/h) | 74.89 mph (120.52 km/h) |
| 80 mph (128.75 km/h) | 79.88 mph (128.56 km/h) |
| 85 mph (136.79 km/h) | 84.87 mph (136.59 km/h) |
| 90 mph (144.84 km/h) | 89.87 mph (144.63 km/h) |
| 95 mph (152.89 km/h) | 94.86 mph (152.66 km/h) |
| 100 mph (160.93 km/h) | 99.85 mph (160.7 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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