Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 245/55-18 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.61 (726.7) | 28.18 (715.7) | -0.43 (-11) -1.5% |
| Width inches (mm) | 9.65 (245) | 9.25 (235) | -0.39 (-10) -4.1% |
| Circum. inches (mm) | 89.88 (2283) | 88.52 (2248.44) | -1.36 (-34.56) -1.5% |
| Sidewall Height inches (mm) | 5.31 (134.75) | 5.09 (129.25) | -0.22 (-5.5) -4.1% |
| Revolutions per mile (km) | 704.93 (438.02) | 715.76 (444.75) | 10.83 (6.73) 1.5% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.7 mph (31.7 km/h) |
| 25 mph (40.23 km/h) | 24.62 mph (39.62 km/h) |
| 30 mph (48.28 km/h) | 29.55 mph (47.55 km/h) |
| 35 mph (56.33 km/h) | 34.47 mph (55.47 km/h) |
| 40 mph (64.37 km/h) | 39.39 mph (63.4 km/h) |
| 45 mph (72.42 km/h) | 44.32 mph (71.32 km/h) |
| 50 mph (80.47 km/h) | 49.24 mph (79.25 km/h) |
| 55 mph (88.51 km/h) | 54.17 mph (87.17 km/h) |
| 60 mph (96.56 km/h) | 59.09 mph (95.1 km/h) |
| 65 mph (104.61 km/h) | 64.02 mph (103.02 km/h) |
| 70 mph (112.65 km/h) | 68.94 mph (110.95 km/h) |
| 75 mph (120.7 km/h) | 73.86 mph (118.87 km/h) |
| 80 mph (128.75 km/h) | 78.79 mph (126.8 km/h) |
| 85 mph (136.79 km/h) | 83.71 mph (134.72 km/h) |
| 90 mph (144.84 km/h) | 88.64 mph (142.65 km/h) |
| 95 mph (152.89 km/h) | 93.56 mph (150.57 km/h) |
| 100 mph (160.93 km/h) | 98.49 mph (158.5 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1821 | 2116 | 2279 | 2380 | 2488 | 2566 | 2651 | 2752 | 2891 | 3031 | 3186 | 3310 | 3534 | 3782 | 3976 | 4100 | 4170 | 4426 | 4782 | 5557 |
Better Fuel Economy Factory Ratios Increased Power
