Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/80-16 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.87 (606.4) | 25.09 (637.2) | 1.21 (30.8) 5.1% |
| Width inches (mm) | 4.92 (125) | 8.86 (225) | 3.94 (100) 80% |
| Circum. inches (mm) | 75 (1905.06) | 78.81 (2001.82) | 3.81 (96.76) 5.1% |
| Sidewall Height inches (mm) | 3.94 (100) | 3.54 (90) | -0.39 (-10) -10% |
| Revolutions per mile (km) | 844.77 (524.92) | 803.94 (499.54) | -40.83 (-25.37) -4.8% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.02 mph (33.82 km/h) |
| 25 mph (40.23 km/h) | 26.27 mph (42.28 km/h) |
| 30 mph (48.28 km/h) | 31.52 mph (50.73 km/h) |
| 35 mph (56.33 km/h) | 36.78 mph (59.19 km/h) |
| 40 mph (64.37 km/h) | 42.03 mph (67.64 km/h) |
| 45 mph (72.42 km/h) | 47.29 mph (76.1 km/h) |
| 50 mph (80.47 km/h) | 52.54 mph (84.55 km/h) |
| 55 mph (88.51 km/h) | 57.79 mph (93.01 km/h) |
| 60 mph (96.56 km/h) | 63.05 mph (101.47 km/h) |
| 65 mph (104.61 km/h) | 68.3 mph (109.92 km/h) |
| 70 mph (112.65 km/h) | 73.56 mph (118.38 km/h) |
| 75 mph (120.7 km/h) | 78.81 mph (126.83 km/h) |
| 80 mph (128.75 km/h) | 84.06 mph (135.29 km/h) |
| 85 mph (136.79 km/h) | 89.32 mph (143.74 km/h) |
| 90 mph (144.84 km/h) | 94.57 mph (152.2 km/h) |
| 95 mph (152.89 km/h) | 99.83 mph (160.65 km/h) |
| 100 mph (160.93 km/h) | 105.08 mph (169.11 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
