Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/50-18 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.86 (682.2) | 27.74 (704.7) | 0.89 (22.5) 3.3% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 84.38 (2143.19) | 87.16 (2213.88) | 2.78 (70.69) 3.3% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 4.87 (123.75) | 0.44 (11.25) 10% |
| Revolutions per mile (km) | 750.91 (466.59) | 726.93 (451.69) | -23.98 (-14.9) -3.2% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.66 mph (33.25 km/h) |
| 25 mph (40.23 km/h) | 25.82 mph (41.56 km/h) |
| 30 mph (48.28 km/h) | 30.99 mph (49.87 km/h) |
| 35 mph (56.33 km/h) | 36.15 mph (58.18 km/h) |
| 40 mph (64.37 km/h) | 41.32 mph (66.5 km/h) |
| 45 mph (72.42 km/h) | 46.48 mph (74.81 km/h) |
| 50 mph (80.47 km/h) | 51.65 mph (83.12 km/h) |
| 55 mph (88.51 km/h) | 56.81 mph (91.43 km/h) |
| 60 mph (96.56 km/h) | 61.98 mph (99.75 km/h) |
| 65 mph (104.61 km/h) | 67.14 mph (108.06 km/h) |
| 70 mph (112.65 km/h) | 72.31 mph (116.37 km/h) |
| 75 mph (120.7 km/h) | 77.47 mph (124.68 km/h) |
| 80 mph (128.75 km/h) | 82.64 mph (132.99 km/h) |
| 85 mph (136.79 km/h) | 87.8 mph (141.31 km/h) |
| 90 mph (144.84 km/h) | 92.97 mph (149.62 km/h) |
| 95 mph (152.89 km/h) | 98.13 mph (157.93 km/h) |
| 100 mph (160.93 km/h) | 103.3 mph (166.24 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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