Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/70-19 | 235/55-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.89 (657.6) | 28.18 (715.7) | 2.29 (58.1) 8.8% |
| Width inches (mm) | 4.92 (125) | 9.25 (235) | 4.33 (110) 88% |
| Circum. inches (mm) | 81.34 (2065.91) | 88.52 (2248.44) | 7.19 (182.53) 8.8% |
| Sidewall Height inches (mm) | 3.44 (87.5) | 5.09 (129.25) | 1.64 (41.75) 47.7% |
| Revolutions per mile (km) | 779 (484.05) | 715.76 (444.75) | -63.24 (-39.29) -8.1% |
235/55-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.77 mph (35.03 km/h) |
| 25 mph (40.23 km/h) | 27.21 mph (43.79 km/h) |
| 30 mph (48.28 km/h) | 32.65 mph (52.55 km/h) |
| 35 mph (56.33 km/h) | 38.09 mph (61.3 km/h) |
| 40 mph (64.37 km/h) | 43.53 mph (70.06 km/h) |
| 45 mph (72.42 km/h) | 48.98 mph (78.82 km/h) |
| 50 mph (80.47 km/h) | 54.42 mph (87.58 km/h) |
| 55 mph (88.51 km/h) | 59.86 mph (96.33 km/h) |
| 60 mph (96.56 km/h) | 65.3 mph (105.09 km/h) |
| 65 mph (104.61 km/h) | 70.74 mph (113.85 km/h) |
| 70 mph (112.65 km/h) | 76.18 mph (122.61 km/h) |
| 75 mph (120.7 km/h) | 81.63 mph (131.37 km/h) |
| 80 mph (128.75 km/h) | 87.07 mph (140.12 km/h) |
| 85 mph (136.79 km/h) | 92.51 mph (148.88 km/h) |
| 90 mph (144.84 km/h) | 97.95 mph (157.64 km/h) |
| 95 mph (152.89 km/h) | 103.39 mph (166.4 km/h) |
| 100 mph (160.93 km/h) | 108.84 mph (175.15 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
