Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 125/60-18 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.91 (607.2) | 25.09 (637.2) | 1.18 (30) 4.9% |
| Width inches (mm) | 4.92 (125) | 8.86 (225) | 3.94 (100) 80% |
| Circum. inches (mm) | 75.1 (1907.58) | 78.81 (2001.82) | 3.71 (94.25) 4.9% |
| Sidewall Height inches (mm) | 2.95 (75) | 3.54 (90) | 0.59 (15) 20% |
| Revolutions per mile (km) | 843.66 (524.22) | 803.94 (499.54) | -39.72 (-24.68) -4.7% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.99 mph (33.78 km/h) |
| 25 mph (40.23 km/h) | 26.24 mph (42.22 km/h) |
| 30 mph (48.28 km/h) | 31.48 mph (50.67 km/h) |
| 35 mph (56.33 km/h) | 36.73 mph (59.11 km/h) |
| 40 mph (64.37 km/h) | 41.98 mph (67.55 km/h) |
| 45 mph (72.42 km/h) | 47.22 mph (76 km/h) |
| 50 mph (80.47 km/h) | 52.47 mph (84.44 km/h) |
| 55 mph (88.51 km/h) | 57.72 mph (92.89 km/h) |
| 60 mph (96.56 km/h) | 62.96 mph (101.33 km/h) |
| 65 mph (104.61 km/h) | 68.21 mph (109.78 km/h) |
| 70 mph (112.65 km/h) | 73.46 mph (118.22 km/h) |
| 75 mph (120.7 km/h) | 78.71 mph (126.66 km/h) |
| 80 mph (128.75 km/h) | 83.95 mph (135.11 km/h) |
| 85 mph (136.79 km/h) | 89.2 mph (143.55 km/h) |
| 90 mph (144.84 km/h) | 94.45 mph (152 km/h) |
| 95 mph (152.89 km/h) | 99.69 mph (160.44 km/h) |
| 100 mph (160.93 km/h) | 104.94 mph (168.89 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
