Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/30-18 | 225/25-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.55 (598.2) | 22.43 (569.7) | -1.12 (-28.5) -4.8% |
| Width inches (mm) | 9.25 (235) | 8.86 (225) | -0.39 (-10) -4.3% |
| Circum. inches (mm) | 73.99 (1879.3) | 70.46 (1789.77) | -3.53 (-89.54) -4.8% |
| Sidewall Height inches (mm) | 2.78 (70.5) | 2.21 (56.25) | -0.56 (-14.25) -20.2% |
| Revolutions per mile (km) | 856.35 (532.11) | 899.19 (558.73) | 42.84 (26.62) 5% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.05 mph (30.65 km/h) |
| 25 mph (40.23 km/h) | 23.81 mph (38.32 km/h) |
| 30 mph (48.28 km/h) | 28.57 mph (45.98 km/h) |
| 35 mph (56.33 km/h) | 33.33 mph (53.64 km/h) |
| 40 mph (64.37 km/h) | 38.09 mph (61.31 km/h) |
| 45 mph (72.42 km/h) | 42.86 mph (68.97 km/h) |
| 50 mph (80.47 km/h) | 47.62 mph (76.63 km/h) |
| 55 mph (88.51 km/h) | 52.38 mph (84.3 km/h) |
| 60 mph (96.56 km/h) | 57.14 mph (91.96 km/h) |
| 65 mph (104.61 km/h) | 61.9 mph (99.62 km/h) |
| 70 mph (112.65 km/h) | 66.66 mph (107.29 km/h) |
| 75 mph (120.7 km/h) | 71.43 mph (114.95 km/h) |
| 80 mph (128.75 km/h) | 76.19 mph (122.61 km/h) |
| 85 mph (136.79 km/h) | 80.95 mph (130.28 km/h) |
| 90 mph (144.84 km/h) | 85.71 mph (137.94 km/h) |
| 95 mph (152.89 km/h) | 90.47 mph (145.6 km/h) |
| 100 mph (160.93 km/h) | 95.24 mph (153.27 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2288 | 2658 | 2863 | 2989 | 3126 | 3223 | 3330 | 3457 | 3632 | 3807 | 4002 | 4158 | 4440 | 4752 | 4995 | 5151 | 5239 | 5560 | 6008 | 6982 |
Better Fuel Economy Factory Ratios Increased Power
