Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 145/70-18 | 135/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.99 (660.2) | 25.44 (646.2) | -0.55 (-14) -2.1% |
| Width inches (mm) | 5.71 (145) | 5.31 (135) | -0.39 (-10) -6.9% |
| Circum. inches (mm) | 81.66 (2074.08) | 79.93 (2030.1) | -1.73 (-43.98) -2.1% |
| Sidewall Height inches (mm) | 4 (101.5) | 3.72 (94.5) | -0.28 (-7) -6.9% |
| Revolutions per mile (km) | 775.93 (482.14) | 792.74 (492.59) | 16.81 (10.45) 2.2% |
135/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.58 mph (31.5 km/h) |
| 25 mph (40.23 km/h) | 24.47 mph (39.38 km/h) |
| 30 mph (48.28 km/h) | 29.36 mph (47.26 km/h) |
| 35 mph (56.33 km/h) | 34.26 mph (55.13 km/h) |
| 40 mph (64.37 km/h) | 39.15 mph (63.01 km/h) |
| 45 mph (72.42 km/h) | 44.05 mph (70.88 km/h) |
| 50 mph (80.47 km/h) | 48.94 mph (78.76 km/h) |
| 55 mph (88.51 km/h) | 53.83 mph (86.64 km/h) |
| 60 mph (96.56 km/h) | 58.73 mph (94.51 km/h) |
| 65 mph (104.61 km/h) | 63.62 mph (102.39 km/h) |
| 70 mph (112.65 km/h) | 68.52 mph (110.27 km/h) |
| 75 mph (120.7 km/h) | 73.41 mph (118.14 km/h) |
| 80 mph (128.75 km/h) | 78.3 mph (126.02 km/h) |
| 85 mph (136.79 km/h) | 83.2 mph (133.89 km/h) |
| 90 mph (144.84 km/h) | 88.09 mph (141.77 km/h) |
| 95 mph (152.89 km/h) | 92.99 mph (149.65 km/h) |
| 100 mph (160.93 km/h) | 97.88 mph (157.52 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2017 | 2344 | 2524 | 2635 | 2756 | 2841 | 2936 | 3048 | 3202 | 3357 | 3528 | 3666 | 3915 | 4189 | 4404 | 4541 | 4619 | 4902 | 5297 | 6155 |
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