Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/80-17 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.5 (647.8) | 25.97 (659.7) | 0.47 (11.9) 1.8% |
| Width inches (mm) | 5.31 (135) | 8.86 (225) | 3.54 (90) 66.7% |
| Circum. inches (mm) | 80.12 (2035.12) | 81.59 (2072.51) | 1.47 (37.38) 1.8% |
| Sidewall Height inches (mm) | 4.25 (108) | 3.99 (101.25) | -0.27 (-6.75) -6.3% |
| Revolutions per mile (km) | 790.78 (491.37) | 776.52 (482.51) | -14.26 (-8.86) -1.8% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.37 mph (32.78 km/h) |
| 25 mph (40.23 km/h) | 25.46 mph (40.97 km/h) |
| 30 mph (48.28 km/h) | 30.55 mph (49.17 km/h) |
| 35 mph (56.33 km/h) | 35.64 mph (57.36 km/h) |
| 40 mph (64.37 km/h) | 40.73 mph (65.56 km/h) |
| 45 mph (72.42 km/h) | 45.83 mph (73.75 km/h) |
| 50 mph (80.47 km/h) | 50.92 mph (81.95 km/h) |
| 55 mph (88.51 km/h) | 56.01 mph (90.14 km/h) |
| 60 mph (96.56 km/h) | 61.1 mph (98.33 km/h) |
| 65 mph (104.61 km/h) | 66.19 mph (106.53 km/h) |
| 70 mph (112.65 km/h) | 71.29 mph (114.72 km/h) |
| 75 mph (120.7 km/h) | 76.38 mph (122.92 km/h) |
| 80 mph (128.75 km/h) | 81.47 mph (131.11 km/h) |
| 85 mph (136.79 km/h) | 86.56 mph (139.31 km/h) |
| 90 mph (144.84 km/h) | 91.65 mph (147.5 km/h) |
| 95 mph (152.89 km/h) | 96.75 mph (155.7 km/h) |
| 100 mph (160.93 km/h) | 101.84 mph (163.89 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1976 | 2296 | 2472 | 2582 | 2699 | 2783 | 2876 | 2985 | 3137 | 3288 | 3456 | 3591 | 3834 | 4104 | 4314 | 4448 | 4524 | 4801 | 5188 | 6029 |
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