Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/70-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.06 (814.2) | 26.86 (682.2) | -5.2 (-132) -16.2% |
| Width inches (mm) | 10.04 (255) | 8.86 (225) | -1.18 (-30) -11.8% |
| Circum. inches (mm) | 100.7 (2557.88) | 84.38 (2143.19) | -16.33 (-414.69) -16.2% |
| Sidewall Height inches (mm) | 7.03 (178.5) | 4.43 (112.5) | -2.6 (-66) -37% |
| Revolutions per mile (km) | 629.17 (390.95) | 750.91 (466.59) | 121.74 (75.65) 19.3% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 16.76 mph (26.97 km/h) |
| 25 mph (40.23 km/h) | 20.95 mph (33.71 km/h) |
| 30 mph (48.28 km/h) | 25.14 mph (40.45 km/h) |
| 35 mph (56.33 km/h) | 29.33 mph (47.2 km/h) |
| 40 mph (64.37 km/h) | 33.52 mph (53.94 km/h) |
| 45 mph (72.42 km/h) | 37.7 mph (60.68 km/h) |
| 50 mph (80.47 km/h) | 41.89 mph (67.42 km/h) |
| 55 mph (88.51 km/h) | 46.08 mph (74.16 km/h) |
| 60 mph (96.56 km/h) | 50.27 mph (80.91 km/h) |
| 65 mph (104.61 km/h) | 54.46 mph (87.65 km/h) |
| 70 mph (112.65 km/h) | 58.65 mph (94.39 km/h) |
| 75 mph (120.7 km/h) | 62.84 mph (101.13 km/h) |
| 80 mph (128.75 km/h) | 67.03 mph (107.87 km/h) |
| 85 mph (136.79 km/h) | 71.22 mph (114.62 km/h) |
| 90 mph (144.84 km/h) | 75.41 mph (121.36 km/h) |
| 95 mph (152.89 km/h) | 79.6 mph (128.1 km/h) |
| 100 mph (160.93 km/h) | 83.79 mph (134.84 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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