Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 195/40-18 | 215/40-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 24.14 (613.2) | 24.77 (629.2) | 0.63 (16) 2.6% |
| Width inches (mm) | 7.68 (195) | 8.46 (215) | 0.79 (20) 10.3% |
| Circum. inches (mm) | 75.84 (1926.42) | 77.82 (1976.69) | 1.98 (50.27) 2.6% |
| Sidewall Height inches (mm) | 3.07 (78) | 3.39 (86) | 0.31 (8) 10.3% |
| Revolutions per mile (km) | 835.4 (519.1) | 814.16 (505.9) | -21.24 (-13.2) -2.5% |
215/40-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.52 mph (33.03 km/h) |
| 25 mph (40.23 km/h) | 25.65 mph (41.28 km/h) |
| 30 mph (48.28 km/h) | 30.78 mph (49.54 km/h) |
| 35 mph (56.33 km/h) | 35.91 mph (57.8 km/h) |
| 40 mph (64.37 km/h) | 41.04 mph (66.05 km/h) |
| 45 mph (72.42 km/h) | 46.17 mph (74.31 km/h) |
| 50 mph (80.47 km/h) | 51.3 mph (82.57 km/h) |
| 55 mph (88.51 km/h) | 56.44 mph (90.82 km/h) |
| 60 mph (96.56 km/h) | 61.57 mph (99.08 km/h) |
| 65 mph (104.61 km/h) | 66.7 mph (107.34 km/h) |
| 70 mph (112.65 km/h) | 71.83 mph (115.59 km/h) |
| 75 mph (120.7 km/h) | 76.96 mph (123.85 km/h) |
| 80 mph (128.75 km/h) | 82.09 mph (132.11 km/h) |
| 85 mph (136.79 km/h) | 87.22 mph (140.36 km/h) |
| 90 mph (144.84 km/h) | 92.35 mph (148.62 km/h) |
| 95 mph (152.89 km/h) | 97.48 mph (156.88 km/h) |
| 100 mph (160.93 km/h) | 102.61 mph (165.13 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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