Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 155/80-17 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 26.76 (679.8) | 27.74 (704.7) | 0.98 (24.9) 3.7% |
| Width inches (mm) | 6.1 (155) | 8.86 (225) | 2.76 (70) 45.2% |
| Circum. inches (mm) | 84.08 (2135.65) | 87.16 (2213.88) | 3.08 (78.23) 3.7% |
| Sidewall Height inches (mm) | 4.88 (124) | 4.87 (123.75) | -0.01 (-0.25) -0.2% |
| Revolutions per mile (km) | 753.56 (468.24) | 726.93 (451.69) | -26.63 (-16.54) -3.5% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.73 mph (33.37 km/h) |
| 25 mph (40.23 km/h) | 25.92 mph (41.71 km/h) |
| 30 mph (48.28 km/h) | 31.1 mph (50.05 km/h) |
| 35 mph (56.33 km/h) | 36.28 mph (58.39 km/h) |
| 40 mph (64.37 km/h) | 41.47 mph (66.73 km/h) |
| 45 mph (72.42 km/h) | 46.65 mph (75.07 km/h) |
| 50 mph (80.47 km/h) | 51.83 mph (83.41 km/h) |
| 55 mph (88.51 km/h) | 57.01 mph (91.76 km/h) |
| 60 mph (96.56 km/h) | 62.2 mph (100.1 km/h) |
| 65 mph (104.61 km/h) | 67.38 mph (108.44 km/h) |
| 70 mph (112.65 km/h) | 72.56 mph (116.78 km/h) |
| 75 mph (120.7 km/h) | 77.75 mph (125.12 km/h) |
| 80 mph (128.75 km/h) | 82.93 mph (133.46 km/h) |
| 85 mph (136.79 km/h) | 88.11 mph (141.81 km/h) |
| 90 mph (144.84 km/h) | 93.3 mph (150.15 km/h) |
| 95 mph (152.89 km/h) | 98.48 mph (158.49 km/h) |
| 100 mph (160.93 km/h) | 103.66 mph (166.83 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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