Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-18 | 225/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.89 (632.2) | 26.86 (682.2) | 1.97 (50) 7.9% |
| Width inches (mm) | 4.92 (125) | 8.86 (225) | 3.94 (100) 80% |
| Circum. inches (mm) | 78.19 (1986.11) | 84.38 (2143.19) | 6.18 (157.08) 7.9% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 4.43 (112.5) | 0.98 (25) 28.6% |
| Revolutions per mile (km) | 810.3 (503.49) | 750.91 (466.59) | -59.39 (-36.9) -7.3% |
225/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.58 mph (34.73 km/h) |
| 25 mph (40.23 km/h) | 26.98 mph (43.42 km/h) |
| 30 mph (48.28 km/h) | 32.37 mph (52.1 km/h) |
| 35 mph (56.33 km/h) | 37.77 mph (60.78 km/h) |
| 40 mph (64.37 km/h) | 43.16 mph (69.47 km/h) |
| 45 mph (72.42 km/h) | 48.56 mph (78.15 km/h) |
| 50 mph (80.47 km/h) | 53.95 mph (86.83 km/h) |
| 55 mph (88.51 km/h) | 59.35 mph (95.51 km/h) |
| 60 mph (96.56 km/h) | 64.75 mph (104.2 km/h) |
| 65 mph (104.61 km/h) | 70.14 mph (112.88 km/h) |
| 70 mph (112.65 km/h) | 75.54 mph (121.56 km/h) |
| 75 mph (120.7 km/h) | 80.93 mph (130.25 km/h) |
| 80 mph (128.75 km/h) | 86.33 mph (138.93 km/h) |
| 85 mph (136.79 km/h) | 91.72 mph (147.61 km/h) |
| 90 mph (144.84 km/h) | 97.12 mph (156.3 km/h) |
| 95 mph (152.89 km/h) | 102.51 mph (164.98 km/h) |
| 100 mph (160.93 km/h) | 107.91 mph (173.66 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 |
Better Fuel Economy Factory Ratios Increased Power
