Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/55-16 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.74 (653.9) | 27.74 (704.7) | 2 (50.8) 7.8% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 80.88 (2054.29) | 87.16 (2213.88) | 6.28 (159.59) 7.8% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.87 (123.75) | 0 (0) 0% |
| Revolutions per mile (km) | 783.41 (486.79) | 726.93 (451.69) | -56.47 (-35.09) -7.2% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.55 mph (34.69 km/h) |
| 25 mph (40.23 km/h) | 26.94 mph (43.36 km/h) |
| 30 mph (48.28 km/h) | 32.33 mph (52.03 km/h) |
| 35 mph (56.33 km/h) | 37.72 mph (60.7 km/h) |
| 40 mph (64.37 km/h) | 43.11 mph (69.37 km/h) |
| 45 mph (72.42 km/h) | 48.5 mph (78.05 km/h) |
| 50 mph (80.47 km/h) | 53.88 mph (86.72 km/h) |
| 55 mph (88.51 km/h) | 59.27 mph (95.39 km/h) |
| 60 mph (96.56 km/h) | 64.66 mph (104.06 km/h) |
| 65 mph (104.61 km/h) | 70.05 mph (112.73 km/h) |
| 70 mph (112.65 km/h) | 75.44 mph (121.41 km/h) |
| 75 mph (120.7 km/h) | 80.83 mph (130.08 km/h) |
| 80 mph (128.75 km/h) | 86.22 mph (138.75 km/h) |
| 85 mph (136.79 km/h) | 91.6 mph (147.42 km/h) |
| 90 mph (144.84 km/h) | 96.99 mph (156.09 km/h) |
| 95 mph (152.89 km/h) | 102.38 mph (164.77 km/h) |
| 100 mph (160.93 km/h) | 107.77 mph (173.44 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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