Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/55-18 | 235/50-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.74 (704.7) | 27.25 (692.2) | -0.49 (-12.5) -1.8% |
| Width inches (mm) | 8.86 (225) | 9.25 (235) | 0.39 (10) 4.4% |
| Circum. inches (mm) | 87.16 (2213.88) | 85.61 (2174.61) | -1.55 (-39.27) -1.8% |
| Sidewall Height inches (mm) | 4.87 (123.75) | 4.63 (117.5) | -0.25 (-6.25) -5.1% |
| Revolutions per mile (km) | 726.93 (451.69) | 740.06 (459.85) | 13.13 (8.16) 1.8% |
235/50-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.65 mph (31.62 km/h) |
| 25 mph (40.23 km/h) | 24.56 mph (39.52 km/h) |
| 30 mph (48.28 km/h) | 29.47 mph (47.42 km/h) |
| 35 mph (56.33 km/h) | 34.38 mph (55.33 km/h) |
| 40 mph (64.37 km/h) | 39.29 mph (63.23 km/h) |
| 45 mph (72.42 km/h) | 44.2 mph (71.14 km/h) |
| 50 mph (80.47 km/h) | 49.11 mph (79.04 km/h) |
| 55 mph (88.51 km/h) | 54.02 mph (86.94 km/h) |
| 60 mph (96.56 km/h) | 58.94 mph (94.85 km/h) |
| 65 mph (104.61 km/h) | 63.85 mph (102.75 km/h) |
| 70 mph (112.65 km/h) | 68.76 mph (110.66 km/h) |
| 75 mph (120.7 km/h) | 73.67 mph (118.56 km/h) |
| 80 mph (128.75 km/h) | 78.58 mph (126.46 km/h) |
| 85 mph (136.79 km/h) | 83.49 mph (134.37 km/h) |
| 90 mph (144.84 km/h) | 88.4 mph (142.27 km/h) |
| 95 mph (152.89 km/h) | 93.31 mph (150.18 km/h) |
| 100 mph (160.93 km/h) | 98.23 mph (158.08 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
