Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 165/55-16 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.15 (587.9) | 27.74 (704.7) | 4.6 (116.8) 19.9% |
| Width inches (mm) | 6.5 (165) | 8.86 (225) | 2.36 (60) 36.4% |
| Circum. inches (mm) | 72.71 (1846.94) | 87.16 (2213.88) | 14.45 (366.94) 19.9% |
| Sidewall Height inches (mm) | 3.57 (90.75) | 4.87 (123.75) | 1.3 (33) 36.4% |
| Revolutions per mile (km) | 871.36 (541.43) | 726.93 (451.69) | -144.42 (-89.74) -16.6% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.97 mph (38.58 km/h) |
| 25 mph (40.23 km/h) | 29.97 mph (48.23 km/h) |
| 30 mph (48.28 km/h) | 35.96 mph (57.87 km/h) |
| 35 mph (56.33 km/h) | 41.95 mph (67.52 km/h) |
| 40 mph (64.37 km/h) | 47.95 mph (77.16 km/h) |
| 45 mph (72.42 km/h) | 53.94 mph (86.81 km/h) |
| 50 mph (80.47 km/h) | 59.93 mph (96.45 km/h) |
| 55 mph (88.51 km/h) | 65.93 mph (106.1 km/h) |
| 60 mph (96.56 km/h) | 71.92 mph (115.74 km/h) |
| 65 mph (104.61 km/h) | 77.91 mph (125.39 km/h) |
| 70 mph (112.65 km/h) | 83.91 mph (135.04 km/h) |
| 75 mph (120.7 km/h) | 89.9 mph (144.68 km/h) |
| 80 mph (128.75 km/h) | 95.89 mph (154.33 km/h) |
| 85 mph (136.79 km/h) | 101.89 mph (163.97 km/h) |
| 90 mph (144.84 km/h) | 107.88 mph (173.62 km/h) |
| 95 mph (152.89 km/h) | 113.87 mph (183.26 km/h) |
| 100 mph (160.93 km/h) | 119.87 mph (192.91 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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