Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/50-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.25 (692.2) | 26.86 (682.2) | -0.39 (-10) -1.4% |
| Width inches (mm) | 9.25 (235) | 8.86 (225) | -0.39 (-10) -4.3% |
| Circum. inches (mm) | 85.61 (2174.61) | 84.38 (2143.19) | -1.24 (-31.42) -1.4% |
| Sidewall Height inches (mm) | 4.63 (117.5) | 4.43 (112.5) | -0.2 (-5) -4.3% |
| Revolutions per mile (km) | 740.06 (459.85) | 750.91 (466.59) | 10.85 (6.74) 1.5% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.71 mph (31.72 km/h) |
| 25 mph (40.23 km/h) | 24.64 mph (39.65 km/h) |
| 30 mph (48.28 km/h) | 29.57 mph (47.58 km/h) |
| 35 mph (56.33 km/h) | 34.49 mph (55.51 km/h) |
| 40 mph (64.37 km/h) | 39.42 mph (63.44 km/h) |
| 45 mph (72.42 km/h) | 44.35 mph (71.37 km/h) |
| 50 mph (80.47 km/h) | 49.28 mph (79.3 km/h) |
| 55 mph (88.51 km/h) | 54.21 mph (87.24 km/h) |
| 60 mph (96.56 km/h) | 59.13 mph (95.17 km/h) |
| 65 mph (104.61 km/h) | 64.06 mph (103.1 km/h) |
| 70 mph (112.65 km/h) | 68.99 mph (111.03 km/h) |
| 75 mph (120.7 km/h) | 73.92 mph (118.96 km/h) |
| 80 mph (128.75 km/h) | 78.84 mph (126.89 km/h) |
| 85 mph (136.79 km/h) | 83.77 mph (134.82 km/h) |
| 90 mph (144.84 km/h) | 88.7 mph (142.75 km/h) |
| 95 mph (152.89 km/h) | 93.63 mph (150.68 km/h) |
| 100 mph (160.93 km/h) | 98.56 mph (158.61 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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