Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/90-16 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.86 (631.4) | 25.09 (637.2) | 0.23 (5.8) 0.9% |
| Width inches (mm) | 4.92 (125) | 8.86 (225) | 3.94 (100) 80% |
| Circum. inches (mm) | 78.09 (1983.6) | 78.81 (2001.82) | 0.72 (18.22) 0.9% |
| Sidewall Height inches (mm) | 4.43 (112.5) | 3.54 (90) | -0.89 (-22.5) -20% |
| Revolutions per mile (km) | 811.32 (504.13) | 803.94 (499.54) | -7.38 (-4.59) -0.9% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.18 mph (32.48 km/h) |
| 25 mph (40.23 km/h) | 25.23 mph (40.6 km/h) |
| 30 mph (48.28 km/h) | 30.28 mph (48.72 km/h) |
| 35 mph (56.33 km/h) | 35.32 mph (56.84 km/h) |
| 40 mph (64.37 km/h) | 40.37 mph (64.97 km/h) |
| 45 mph (72.42 km/h) | 45.41 mph (73.09 km/h) |
| 50 mph (80.47 km/h) | 50.46 mph (81.21 km/h) |
| 55 mph (88.51 km/h) | 55.51 mph (89.33 km/h) |
| 60 mph (96.56 km/h) | 60.55 mph (97.45 km/h) |
| 65 mph (104.61 km/h) | 65.6 mph (105.57 km/h) |
| 70 mph (112.65 km/h) | 70.64 mph (113.69 km/h) |
| 75 mph (120.7 km/h) | 75.69 mph (121.81 km/h) |
| 80 mph (128.75 km/h) | 80.73 mph (129.93 km/h) |
| 85 mph (136.79 km/h) | 85.78 mph (138.05 km/h) |
| 90 mph (144.84 km/h) | 90.83 mph (146.17 km/h) |
| 95 mph (152.89 km/h) | 95.87 mph (154.29 km/h) |
| 100 mph (160.93 km/h) | 100.92 mph (162.41 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2046 | 2377 | 2560 | 2673 | 2795 | 2882 | 2977 | 3091 | 3247 | 3404 | 3578 | 3717 | 3970 | 4248 | 4466 | 4605 | 4684 | 4971 | 5372 | 6242 |
Better Fuel Economy Factory Ratios Increased Power
