Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/55-17 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.74 (679.3) | 25.97 (659.7) | -0.77 (-19.6) -2.9% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 84.02 (2134.08) | 81.59 (2072.51) | -2.42 (-61.58) -2.9% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 3.99 (101.25) | -0.89 (-22.5) -18.2% |
| Revolutions per mile (km) | 754.11 (468.58) | 776.52 (482.51) | 22.41 (13.92) 3% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.42 mph (31.26 km/h) |
| 25 mph (40.23 km/h) | 24.28 mph (39.07 km/h) |
| 30 mph (48.28 km/h) | 29.13 mph (46.89 km/h) |
| 35 mph (56.33 km/h) | 33.99 mph (54.7 km/h) |
| 40 mph (64.37 km/h) | 38.85 mph (62.52 km/h) |
| 45 mph (72.42 km/h) | 43.7 mph (70.33 km/h) |
| 50 mph (80.47 km/h) | 48.56 mph (78.15 km/h) |
| 55 mph (88.51 km/h) | 53.41 mph (85.96 km/h) |
| 60 mph (96.56 km/h) | 58.27 mph (93.77 km/h) |
| 65 mph (104.61 km/h) | 63.12 mph (101.59 km/h) |
| 70 mph (112.65 km/h) | 67.98 mph (109.4 km/h) |
| 75 mph (120.7 km/h) | 72.84 mph (117.22 km/h) |
| 80 mph (128.75 km/h) | 77.69 mph (125.03 km/h) |
| 85 mph (136.79 km/h) | 82.55 mph (132.85 km/h) |
| 90 mph (144.84 km/h) | 87.4 mph (140.66 km/h) |
| 95 mph (152.89 km/h) | 92.26 mph (148.48 km/h) |
| 100 mph (160.93 km/h) | 97.11 mph (156.29 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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