Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 235/40-18 | 215/45-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 25.4 (645.2) | 25.62 (650.7) | 0.22 (5.5) 0.9% |
| Width inches (mm) | 9.25 (235) | 8.46 (215) | -0.79 (-20) -8.5% |
| Circum. inches (mm) | 79.8 (2026.96) | 80.48 (2044.23) | 0.68 (17.28) 0.9% |
| Sidewall Height inches (mm) | 3.7 (94) | 3.81 (96.75) | 0.11 (2.75) 2.9% |
| Revolutions per mile (km) | 793.97 (493.35) | 787.26 (489.18) | -6.71 (-4.17) -0.8% |
215/45-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.17 mph (32.46 km/h) |
| 25 mph (40.23 km/h) | 25.21 mph (40.58 km/h) |
| 30 mph (48.28 km/h) | 30.26 mph (48.69 km/h) |
| 35 mph (56.33 km/h) | 35.3 mph (56.81 km/h) |
| 40 mph (64.37 km/h) | 40.34 mph (64.92 km/h) |
| 45 mph (72.42 km/h) | 45.38 mph (73.04 km/h) |
| 50 mph (80.47 km/h) | 50.43 mph (81.15 km/h) |
| 55 mph (88.51 km/h) | 55.47 mph (89.27 km/h) |
| 60 mph (96.56 km/h) | 60.51 mph (97.38 km/h) |
| 65 mph (104.61 km/h) | 65.55 mph (105.5 km/h) |
| 70 mph (112.65 km/h) | 70.6 mph (113.61 km/h) |
| 75 mph (120.7 km/h) | 75.64 mph (121.73 km/h) |
| 80 mph (128.75 km/h) | 80.68 mph (129.85 km/h) |
| 85 mph (136.79 km/h) | 85.72 mph (137.96 km/h) |
| 90 mph (144.84 km/h) | 90.77 mph (146.08 km/h) |
| 95 mph (152.89 km/h) | 95.81 mph (154.19 km/h) |
| 100 mph (160.93 km/h) | 100.85 mph (162.31 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2003 | 2327 | 2506 | 2617 | 2737 | 2822 | 2916 | 3026 | 3180 | 3333 | 3504 | 3640 | 3887 | 4160 | 4373 | 4510 | 4587 | 4868 | 5260 | 6113 |
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