Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/40-18 | 215/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.09 (637.2) | 24.77 (629.2) | -0.31 (-8) -1.3% |
| Width inches (mm) | 8.86 (225) | 8.46 (215) | -0.39 (-10) -4.4% |
| Circum. inches (mm) | 78.81 (2001.82) | 77.82 (1976.69) | -0.99 (-25.13) -1.3% |
| Sidewall Height inches (mm) | 3.54 (90) | 3.39 (86) | -0.16 (-4) -4.4% |
| Revolutions per mile (km) | 803.94 (499.54) | 814.16 (505.9) | 10.22 (6.35) 1.3% |
215/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.75 mph (31.78 km/h) |
| 25 mph (40.23 km/h) | 24.69 mph (39.73 km/h) |
| 30 mph (48.28 km/h) | 29.62 mph (47.67 km/h) |
| 35 mph (56.33 km/h) | 34.56 mph (55.62 km/h) |
| 40 mph (64.37 km/h) | 39.5 mph (63.57 km/h) |
| 45 mph (72.42 km/h) | 44.44 mph (71.51 km/h) |
| 50 mph (80.47 km/h) | 49.37 mph (79.46 km/h) |
| 55 mph (88.51 km/h) | 54.31 mph (87.4 km/h) |
| 60 mph (96.56 km/h) | 59.25 mph (95.35 km/h) |
| 65 mph (104.61 km/h) | 64.18 mph (103.29 km/h) |
| 70 mph (112.65 km/h) | 69.12 mph (111.24 km/h) |
| 75 mph (120.7 km/h) | 74.06 mph (119.19 km/h) |
| 80 mph (128.75 km/h) | 79 mph (127.13 km/h) |
| 85 mph (136.79 km/h) | 83.93 mph (135.08 km/h) |
| 90 mph (144.84 km/h) | 88.87 mph (143.02 km/h) |
| 95 mph (152.89 km/h) | 93.81 mph (150.97 km/h) |
| 100 mph (160.93 km/h) | 98.74 mph (158.91 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2072 | 2407 | 2592 | 2707 | 2830 | 2918 | 3015 | 3130 | 3289 | 3447 | 3624 | 3765 | 4020 | 4302 | 4523 | 4664 | 4743 | 5034 | 5440 | 6321 |
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