Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/50-18 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.65 (702.2) | 27.74 (704.7) | 0.1 (2.5) 0.4% |
| Width inches (mm) | 9.65 (245) | 8.86 (225) | -0.79 (-20) -8.2% |
| Circum. inches (mm) | 86.85 (2206.03) | 87.16 (2213.88) | 0.31 (7.85) 0.4% |
| Sidewall Height inches (mm) | 4.82 (122.5) | 4.87 (123.75) | 0.05 (1.25) 1% |
| Revolutions per mile (km) | 729.52 (453.3) | 726.93 (451.69) | -2.59 (-1.61) -0.4% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.07 mph (32.3 km/h) |
| 25 mph (40.23 km/h) | 25.09 mph (40.38 km/h) |
| 30 mph (48.28 km/h) | 30.11 mph (48.45 km/h) |
| 35 mph (56.33 km/h) | 35.12 mph (56.53 km/h) |
| 40 mph (64.37 km/h) | 40.14 mph (64.6 km/h) |
| 45 mph (72.42 km/h) | 45.16 mph (72.68 km/h) |
| 50 mph (80.47 km/h) | 50.18 mph (80.75 km/h) |
| 55 mph (88.51 km/h) | 55.2 mph (88.83 km/h) |
| 60 mph (96.56 km/h) | 60.21 mph (96.9 km/h) |
| 65 mph (104.61 km/h) | 65.23 mph (104.98 km/h) |
| 70 mph (112.65 km/h) | 70.25 mph (113.06 km/h) |
| 75 mph (120.7 km/h) | 75.27 mph (121.13 km/h) |
| 80 mph (128.75 km/h) | 80.28 mph (129.21 km/h) |
| 85 mph (136.79 km/h) | 85.3 mph (137.28 km/h) |
| 90 mph (144.84 km/h) | 90.32 mph (145.36 km/h) |
| 95 mph (152.89 km/h) | 95.34 mph (153.43 km/h) |
| 100 mph (160.93 km/h) | 100.36 mph (161.51 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1850 | 2149 | 2314 | 2417 | 2527 | 2606 | 2692 | 2795 | 2936 | 3078 | 3235 | 3361 | 3590 | 3842 | 4038 | 4164 | 4235 | 4495 | 4857 | 5644 |
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