Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 225/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 27.74 (704.7) | -1.77 (-45) -6% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 92.73 (2355.25) | 87.16 (2213.88) | -5.57 (-141.37) -6% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 4.87 (123.75) | -0.89 (-22.5) -15.4% |
| Revolutions per mile (km) | 683.3 (424.58) | 726.93 (451.69) | 43.63 (27.11) 6.4% |
225/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.8 mph (30.25 km/h) |
| 25 mph (40.23 km/h) | 23.5 mph (37.82 km/h) |
| 30 mph (48.28 km/h) | 28.2 mph (45.38 km/h) |
| 35 mph (56.33 km/h) | 32.9 mph (52.95 km/h) |
| 40 mph (64.37 km/h) | 37.6 mph (60.51 km/h) |
| 45 mph (72.42 km/h) | 42.3 mph (68.07 km/h) |
| 50 mph (80.47 km/h) | 47 mph (75.64 km/h) |
| 55 mph (88.51 km/h) | 51.7 mph (83.2 km/h) |
| 60 mph (96.56 km/h) | 56.4 mph (90.76 km/h) |
| 65 mph (104.61 km/h) | 61.1 mph (98.33 km/h) |
| 70 mph (112.65 km/h) | 65.8 mph (105.89 km/h) |
| 75 mph (120.7 km/h) | 70.5 mph (113.46 km/h) |
| 80 mph (128.75 km/h) | 75.2 mph (121.02 km/h) |
| 85 mph (136.79 km/h) | 79.9 mph (128.58 km/h) |
| 90 mph (144.84 km/h) | 84.6 mph (136.15 km/h) |
| 95 mph (152.89 km/h) | 89.3 mph (143.71 km/h) |
| 100 mph (160.93 km/h) | 94 mph (151.27 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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