Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.97 (659.7) | 27.25 (692.2) | 1.28 (32.5) 4.9% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 81.59 (2072.51) | 85.61 (2174.61) | 4.02 (102.1) 4.9% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 4.63 (117.5) | 0.64 (16.25) 16% |
| Revolutions per mile (km) | 776.52 (482.51) | 740.06 (459.85) | -36.46 (-22.65) -4.7% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.99 mph (33.77 km/h) |
| 25 mph (40.23 km/h) | 26.23 mph (42.22 km/h) |
| 30 mph (48.28 km/h) | 31.48 mph (50.66 km/h) |
| 35 mph (56.33 km/h) | 36.72 mph (59.1 km/h) |
| 40 mph (64.37 km/h) | 41.97 mph (67.55 km/h) |
| 45 mph (72.42 km/h) | 47.22 mph (75.99 km/h) |
| 50 mph (80.47 km/h) | 52.46 mph (84.43 km/h) |
| 55 mph (88.51 km/h) | 57.71 mph (92.87 km/h) |
| 60 mph (96.56 km/h) | 62.96 mph (101.32 km/h) |
| 65 mph (104.61 km/h) | 68.2 mph (109.76 km/h) |
| 70 mph (112.65 km/h) | 73.45 mph (118.2 km/h) |
| 75 mph (120.7 km/h) | 78.69 mph (126.65 km/h) |
| 80 mph (128.75 km/h) | 83.94 mph (135.09 km/h) |
| 85 mph (136.79 km/h) | 89.19 mph (143.53 km/h) |
| 90 mph (144.84 km/h) | 94.43 mph (151.98 km/h) |
| 95 mph (152.89 km/h) | 99.68 mph (160.42 km/h) |
| 100 mph (160.93 km/h) | 104.93 mph (168.86 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1883 | 2188 | 2356 | 2460 | 2573 | 2653 | 2741 | 2845 | 2989 | 3134 | 3294 | 3422 | 3654 | 3911 | 4111 | 4239 | 4312 | 4576 | 4945 | 5746 |
Better Fuel Economy Factory Ratios Increased Power
