Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/55-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.91 (759.7) | 32.07 (814.7) | 2.17 (55) 7.2% |
| Width inches (mm) | 10.83 (275) | 10.83 (275) | 0 (0) 0% |
| Circum. inches (mm) | 93.96 (2386.67) | 100.77 (2559.46) | 6.8 (172.79) 7.2% |
| Sidewall Height inches (mm) | 5.95 (151.25) | 7.04 (178.75) | 1.08 (27.5) 18.2% |
| Revolutions per mile (km) | 674.31 (418.99) | 628.78 (390.71) | -45.52 (-28.29) -6.8% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.45 mph (34.52 km/h) |
| 25 mph (40.23 km/h) | 26.81 mph (43.15 km/h) |
| 30 mph (48.28 km/h) | 32.17 mph (51.78 km/h) |
| 35 mph (56.33 km/h) | 37.53 mph (60.41 km/h) |
| 40 mph (64.37 km/h) | 42.9 mph (69.03 km/h) |
| 45 mph (72.42 km/h) | 48.26 mph (77.66 km/h) |
| 50 mph (80.47 km/h) | 53.62 mph (86.29 km/h) |
| 55 mph (88.51 km/h) | 58.98 mph (94.92 km/h) |
| 60 mph (96.56 km/h) | 64.34 mph (103.55 km/h) |
| 65 mph (104.61 km/h) | 69.71 mph (112.18 km/h) |
| 70 mph (112.65 km/h) | 75.07 mph (120.81 km/h) |
| 75 mph (120.7 km/h) | 80.43 mph (129.44 km/h) |
| 80 mph (128.75 km/h) | 85.79 mph (138.07 km/h) |
| 85 mph (136.79 km/h) | 91.15 mph (146.7 km/h) |
| 90 mph (144.84 km/h) | 96.52 mph (155.33 km/h) |
| 95 mph (152.89 km/h) | 101.88 mph (163.96 km/h) |
| 100 mph (160.93 km/h) | 107.24 mph (172.59 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1600 | 1859 | 2002 | 2090 | 2186 | 2254 | 2329 | 2417 | 2540 | 2662 | 2799 | 2907 | 3105 | 3323 | 3493 | 3602 | 3663 | 3888 | 4201 | 4882 |
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