Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/60-13 | 225/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.63 (600.2) | 25.97 (659.7) | 2.34 (59.5) 9.9% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 74.24 (1885.58) | 81.59 (2072.51) | 7.36 (186.92) 9.9% |
| Sidewall Height inches (mm) | 5.31 (135) | 3.99 (101.25) | -1.33 (-33.75) -25% |
| Revolutions per mile (km) | 853.5 (530.34) | 776.52 (482.51) | -76.98 (-47.83) -9% |
225/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.98 mph (35.38 km/h) |
| 25 mph (40.23 km/h) | 27.48 mph (44.22 km/h) |
| 30 mph (48.28 km/h) | 32.97 mph (53.07 km/h) |
| 35 mph (56.33 km/h) | 38.47 mph (61.91 km/h) |
| 40 mph (64.37 km/h) | 43.97 mph (70.76 km/h) |
| 45 mph (72.42 km/h) | 49.46 mph (79.6 km/h) |
| 50 mph (80.47 km/h) | 54.96 mph (88.44 km/h) |
| 55 mph (88.51 km/h) | 60.45 mph (97.29 km/h) |
| 60 mph (96.56 km/h) | 65.95 mph (106.13 km/h) |
| 65 mph (104.61 km/h) | 71.44 mph (114.98 km/h) |
| 70 mph (112.65 km/h) | 76.94 mph (123.82 km/h) |
| 75 mph (120.7 km/h) | 82.44 mph (132.67 km/h) |
| 80 mph (128.75 km/h) | 87.93 mph (141.51 km/h) |
| 85 mph (136.79 km/h) | 93.43 mph (150.36 km/h) |
| 90 mph (144.84 km/h) | 98.92 mph (159.2 km/h) |
| 95 mph (152.89 km/h) | 104.42 mph (168.04 km/h) |
| 100 mph (160.93 km/h) | 109.91 mph (176.89 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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