Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/45-16 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 23.97 (608.9) | 25.09 (637.2) | 1.11 (28.3) 4.6% |
| Width inches (mm) | 8.86 (225) | 8.86 (225) | 0 (0) 0% |
| Circum. inches (mm) | 75.31 (1912.92) | 78.81 (2001.82) | 3.5 (88.91) 4.6% |
| Sidewall Height inches (mm) | 3.99 (101.25) | 3.54 (90) | -0.44 (-11.25) -11.1% |
| Revolutions per mile (km) | 841.3 (522.76) | 803.94 (499.54) | -37.36 (-23.22) -4.4% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.93 mph (33.68 km/h) |
| 25 mph (40.23 km/h) | 26.16 mph (42.1 km/h) |
| 30 mph (48.28 km/h) | 31.39 mph (50.52 km/h) |
| 35 mph (56.33 km/h) | 36.63 mph (58.95 km/h) |
| 40 mph (64.37 km/h) | 41.86 mph (67.37 km/h) |
| 45 mph (72.42 km/h) | 47.09 mph (75.79 km/h) |
| 50 mph (80.47 km/h) | 52.32 mph (84.21 km/h) |
| 55 mph (88.51 km/h) | 57.56 mph (92.63 km/h) |
| 60 mph (96.56 km/h) | 62.79 mph (101.05 km/h) |
| 65 mph (104.61 km/h) | 68.02 mph (109.47 km/h) |
| 70 mph (112.65 km/h) | 73.25 mph (117.89 km/h) |
| 75 mph (120.7 km/h) | 78.49 mph (126.31 km/h) |
| 80 mph (128.75 km/h) | 83.72 mph (134.73 km/h) |
| 85 mph (136.79 km/h) | 88.95 mph (143.15 km/h) |
| 90 mph (144.84 km/h) | 94.18 mph (151.57 km/h) |
| 95 mph (152.89 km/h) | 99.42 mph (159.99 km/h) |
| 100 mph (160.93 km/h) | 104.65 mph (168.41 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 |
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