Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/55-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.74 (704.7) | 26.86 (682.2) | -0.89 (-22.5) -3.2% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 87.16 (2213.88) | 84.38 (2143.19) | -2.78 (-70.69) -3.2% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.43 (112.5) | -0.44 (-11.25) -9.1% |
| Revolutions per mile (km) | 726.93 (451.69) | 750.91 (466.59) | 23.98 (14.9) 3.3% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.36 mph (31.16 km/h) |
| 25 mph (40.23 km/h) | 24.2 mph (38.95 km/h) |
| 30 mph (48.28 km/h) | 29.04 mph (46.74 km/h) |
| 35 mph (56.33 km/h) | 33.88 mph (54.53 km/h) |
| 40 mph (64.37 km/h) | 38.72 mph (62.32 km/h) |
| 45 mph (72.42 km/h) | 43.56 mph (70.11 km/h) |
| 50 mph (80.47 km/h) | 48.4 mph (77.9 km/h) |
| 55 mph (88.51 km/h) | 53.24 mph (85.69 km/h) |
| 60 mph (96.56 km/h) | 58.08 mph (93.48 km/h) |
| 65 mph (104.61 km/h) | 62.92 mph (101.27 km/h) |
| 70 mph (112.65 km/h) | 67.77 mph (109.06 km/h) |
| 75 mph (120.7 km/h) | 72.61 mph (116.85 km/h) |
| 80 mph (128.75 km/h) | 77.45 mph (124.64 km/h) |
| 85 mph (136.79 km/h) | 82.29 mph (132.43 km/h) |
| 90 mph (144.84 km/h) | 87.13 mph (140.22 km/h) |
| 95 mph (152.89 km/h) | 91.97 mph (148.01 km/h) |
| 100 mph (160.93 km/h) | 96.81 mph (155.8 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1911 | 2220 | 2391 | 2496 | 2610 | 2692 | 2781 | 2887 | 3033 | 3179 | 3342 | 3472 | 3708 | 3968 | 4171 | 4302 | 4375 | 4643 | 5017 | 5830 |
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