Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/70-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.54 (674.2) | 26.86 (682.2) | 0.31 (8) 1.2% |
| Width inches (mm) | 6.1 (155) | 8.86 (225) | 2.76 (70) 45.2% |
| Circum. inches (mm) | 83.39 (2118.06) | 84.38 (2143.19) | 0.99 (25.13) 1.2% |
| Sidewall Height inches (mm) | 4.27 (108.5) | 4.43 (112.5) | 0.16 (4) 3.7% |
| Revolutions per mile (km) | 759.82 (472.13) | 750.91 (466.59) | -8.91 (-5.54) -1.2% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.24 mph (32.57 km/h) |
| 25 mph (40.23 km/h) | 25.3 mph (40.71 km/h) |
| 30 mph (48.28 km/h) | 30.36 mph (48.85 km/h) |
| 35 mph (56.33 km/h) | 35.42 mph (57 km/h) |
| 40 mph (64.37 km/h) | 40.47 mph (65.14 km/h) |
| 45 mph (72.42 km/h) | 45.53 mph (73.28 km/h) |
| 50 mph (80.47 km/h) | 50.59 mph (81.42 km/h) |
| 55 mph (88.51 km/h) | 55.65 mph (89.56 km/h) |
| 60 mph (96.56 km/h) | 60.71 mph (97.71 km/h) |
| 65 mph (104.61 km/h) | 65.77 mph (105.85 km/h) |
| 70 mph (112.65 km/h) | 70.83 mph (113.99 km/h) |
| 75 mph (120.7 km/h) | 75.89 mph (122.13 km/h) |
| 80 mph (128.75 km/h) | 80.95 mph (130.28 km/h) |
| 85 mph (136.79 km/h) | 86.01 mph (138.42 km/h) |
| 90 mph (144.84 km/h) | 91.07 mph (146.56 km/h) |
| 95 mph (152.89 km/h) | 96.13 mph (154.7 km/h) |
| 100 mph (160.93 km/h) | 101.19 mph (162.84 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1911 | 2220 | 2391 | 2496 | 2610 | 2692 | 2781 | 2887 | 3033 | 3179 | 3342 | 3472 | 3708 | 3968 | 4171 | 4302 | 4375 | 4643 | 5017 | 5830 |
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