Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 175/90-18 | 225/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.4 (772.2) | 29.4 (746.8) | -1 (-25.4) -3.3% |
| Width inches (mm) | 6.89 (175) | 8.86 (225) | 1.97 (50) 28.6% |
| Circum. inches (mm) | 95.51 (2425.94) | 92.37 (2346.14) | -3.14 (-79.8) -3.3% |
| Sidewall Height inches (mm) | 6.2 (157.5) | 6.2 (157.5) | 0 (0) 0% |
| Revolutions per mile (km) | 663.39 (412.21) | 685.95 (426.23) | 22.56 (14.02) 3.4% |
225/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.34 mph (31.13 km/h) |
| 25 mph (40.23 km/h) | 24.18 mph (38.91 km/h) |
| 30 mph (48.28 km/h) | 29.01 mph (46.69 km/h) |
| 35 mph (56.33 km/h) | 33.85 mph (54.47 km/h) |
| 40 mph (64.37 km/h) | 38.68 mph (62.26 km/h) |
| 45 mph (72.42 km/h) | 43.52 mph (70.04 km/h) |
| 50 mph (80.47 km/h) | 48.36 mph (77.82 km/h) |
| 55 mph (88.51 km/h) | 53.19 mph (85.6 km/h) |
| 60 mph (96.56 km/h) | 58.03 mph (93.38 km/h) |
| 65 mph (104.61 km/h) | 62.86 mph (101.17 km/h) |
| 70 mph (112.65 km/h) | 67.7 mph (108.95 km/h) |
| 75 mph (120.7 km/h) | 72.53 mph (116.73 km/h) |
| 80 mph (128.75 km/h) | 77.37 mph (124.51 km/h) |
| 85 mph (136.79 km/h) | 82.2 mph (132.29 km/h) |
| 90 mph (144.84 km/h) | 87.04 mph (140.08 km/h) |
| 95 mph (152.89 km/h) | 91.88 mph (147.86 km/h) |
| 100 mph (160.93 km/h) | 96.71 mph (155.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1746 | 2028 | 2184 | 2280 | 2384 | 2459 | 2540 | 2637 | 2771 | 2904 | 3053 | 3172 | 3387 | 3625 | 3811 | 3930 | 3996 | 4241 | 4583 | 5326 |
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