Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 135/70-17 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.44 (620.8) | 25.97 (659.7) | 1.53 (38.9) 6.3% |
| Width inches (mm) | 5.31 (135) | 8.86 (225) | 3.54 (90) 66.7% |
| Circum. inches (mm) | 76.78 (1950.3) | 81.59 (2072.51) | 4.81 (122.21) 6.3% |
| Sidewall Height inches (mm) | 3.72 (94.5) | 3.99 (101.25) | 0.27 (6.75) 7.1% |
| Revolutions per mile (km) | 825.18 (512.74) | 776.52 (482.51) | -48.66 (-30.23) -5.9% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.25 mph (34.2 km/h) |
| 25 mph (40.23 km/h) | 26.57 mph (42.75 km/h) |
| 30 mph (48.28 km/h) | 31.88 mph (51.31 km/h) |
| 35 mph (56.33 km/h) | 37.19 mph (59.86 km/h) |
| 40 mph (64.37 km/h) | 42.51 mph (68.41 km/h) |
| 45 mph (72.42 km/h) | 47.82 mph (76.96 km/h) |
| 50 mph (80.47 km/h) | 53.13 mph (85.51 km/h) |
| 55 mph (88.51 km/h) | 58.45 mph (94.06 km/h) |
| 60 mph (96.56 km/h) | 63.76 mph (102.61 km/h) |
| 65 mph (104.61 km/h) | 69.07 mph (111.16 km/h) |
| 70 mph (112.65 km/h) | 74.39 mph (119.71 km/h) |
| 75 mph (120.7 km/h) | 79.7 mph (128.26 km/h) |
| 80 mph (128.75 km/h) | 85.01 mph (136.82 km/h) |
| 85 mph (136.79 km/h) | 90.33 mph (145.37 km/h) |
| 90 mph (144.84 km/h) | 95.64 mph (153.92 km/h) |
| 95 mph (152.89 km/h) | 100.95 mph (162.47 km/h) |
| 100 mph (160.93 km/h) | 106.27 mph (171.02 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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