Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 295/30-18 | 225/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.97 (634.2) | 25.09 (637.2) | 0.12 (3) 0.5% |
| Width inches (mm) | 11.61 (295) | 8.86 (225) | -2.76 (-70) -23.7% |
| Circum. inches (mm) | 78.44 (1992.4) | 78.81 (2001.82) | 0.37 (9.42) 0.5% |
| Sidewall Height inches (mm) | 3.48 (88.5) | 3.54 (90) | 0.06 (1.5) 1.7% |
| Revolutions per mile (km) | 807.74 (501.91) | 803.94 (499.54) | -3.8 (-2.36) -0.5% |
225/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.09 mph (32.34 km/h) |
| 25 mph (40.23 km/h) | 25.12 mph (40.42 km/h) |
| 30 mph (48.28 km/h) | 30.14 mph (48.51 km/h) |
| 35 mph (56.33 km/h) | 35.17 mph (56.59 km/h) |
| 40 mph (64.37 km/h) | 40.19 mph (64.68 km/h) |
| 45 mph (72.42 km/h) | 45.21 mph (72.76 km/h) |
| 50 mph (80.47 km/h) | 50.24 mph (80.85 km/h) |
| 55 mph (88.51 km/h) | 55.26 mph (88.93 km/h) |
| 60 mph (96.56 km/h) | 60.28 mph (97.02 km/h) |
| 65 mph (104.61 km/h) | 65.31 mph (105.1 km/h) |
| 70 mph (112.65 km/h) | 70.33 mph (113.19 km/h) |
| 75 mph (120.7 km/h) | 75.35 mph (121.27 km/h) |
| 80 mph (128.75 km/h) | 80.38 mph (129.36 km/h) |
| 85 mph (136.79 km/h) | 85.4 mph (137.44 km/h) |
| 90 mph (144.84 km/h) | 90.43 mph (145.53 km/h) |
| 95 mph (152.89 km/h) | 95.45 mph (153.61 km/h) |
| 100 mph (160.93 km/h) | 100.47 mph (161.7 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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