Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-18 | 125/70-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.5 (673.2) | 24.89 (632.2) | -1.61 (-41) -6.1% |
| Width inches (mm) | 5.31 (135) | 4.92 (125) | -0.39 (-10) -7.4% |
| Circum. inches (mm) | 83.26 (2114.92) | 78.19 (1986.11) | -5.07 (-128.81) -6.1% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.44 (87.5) | -0.81 (-20.5) -19% |
| Revolutions per mile (km) | 760.95 (472.83) | 810.3 (503.49) | 49.35 (30.66) 6.5% |
125/70-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.78 mph (30.23 km/h) |
| 25 mph (40.23 km/h) | 23.48 mph (37.78 km/h) |
| 30 mph (48.28 km/h) | 28.17 mph (45.34 km/h) |
| 35 mph (56.33 km/h) | 32.87 mph (52.9 km/h) |
| 40 mph (64.37 km/h) | 37.56 mph (60.45 km/h) |
| 45 mph (72.42 km/h) | 42.26 mph (68.01 km/h) |
| 50 mph (80.47 km/h) | 46.95 mph (75.57 km/h) |
| 55 mph (88.51 km/h) | 51.65 mph (83.12 km/h) |
| 60 mph (96.56 km/h) | 56.35 mph (90.68 km/h) |
| 65 mph (104.61 km/h) | 61.04 mph (98.24 km/h) |
| 70 mph (112.65 km/h) | 65.74 mph (105.79 km/h) |
| 75 mph (120.7 km/h) | 70.43 mph (113.35 km/h) |
| 80 mph (128.75 km/h) | 75.13 mph (120.91 km/h) |
| 85 mph (136.79 km/h) | 79.82 mph (128.46 km/h) |
| 90 mph (144.84 km/h) | 84.52 mph (136.02 km/h) |
| 95 mph (152.89 km/h) | 89.21 mph (143.58 km/h) |
| 100 mph (160.93 km/h) | 93.91 mph (151.13 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2062 | 2395 | 2580 | 2694 | 2817 | 2904 | 3001 | 3115 | 3273 | 3431 | 3606 | 3747 | 4001 | 4282 | 4501 | 4642 | 4721 | 5010 | 5414 | 6291 |
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