Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 195/40-18 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.14 (613.2) | 25.09 (637.2) | 0.94 (24) 3.9% |
| Width inches (mm) | 7.68 (195) | 8.86 (225) | 1.18 (30) 15.4% |
| Circum. inches (mm) | 75.84 (1926.42) | 78.81 (2001.82) | 2.97 (75.4) 3.9% |
| Sidewall Height inches (mm) | 3.07 (78) | 3.54 (90) | 0.47 (12) 15.4% |
| Revolutions per mile (km) | 835.4 (519.1) | 803.94 (499.54) | -31.47 (-19.55) -3.8% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.78 mph (33.45 km/h) |
| 25 mph (40.23 km/h) | 25.98 mph (41.81 km/h) |
| 30 mph (48.28 km/h) | 31.17 mph (50.17 km/h) |
| 35 mph (56.33 km/h) | 36.37 mph (58.53 km/h) |
| 40 mph (64.37 km/h) | 41.57 mph (66.89 km/h) |
| 45 mph (72.42 km/h) | 46.76 mph (75.26 km/h) |
| 50 mph (80.47 km/h) | 51.96 mph (83.62 km/h) |
| 55 mph (88.51 km/h) | 57.15 mph (91.98 km/h) |
| 60 mph (96.56 km/h) | 62.35 mph (100.34 km/h) |
| 65 mph (104.61 km/h) | 67.54 mph (108.7 km/h) |
| 70 mph (112.65 km/h) | 72.74 mph (117.06 km/h) |
| 75 mph (120.7 km/h) | 77.94 mph (125.43 km/h) |
| 80 mph (128.75 km/h) | 83.13 mph (133.79 km/h) |
| 85 mph (136.79 km/h) | 88.33 mph (142.15 km/h) |
| 90 mph (144.84 km/h) | 93.52 mph (150.51 km/h) |
| 95 mph (152.89 km/h) | 98.72 mph (158.87 km/h) |
| 100 mph (160.93 km/h) | 103.91 mph (167.23 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
