Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/80-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.06 (865.2) | 32.07 (814.7) | -1.99 (-50.5) -5.8% |
| Width inches (mm) | 10.04 (255) | 10.83 (275) | 0.79 (20) 7.8% |
| Circum. inches (mm) | 107.01 (2718.11) | 100.77 (2559.46) | -6.25 (-158.65) -5.8% |
| Sidewall Height inches (mm) | 8.03 (204) | 7.04 (178.75) | -0.99 (-25.25) -12.4% |
| Revolutions per mile (km) | 592.08 (367.9) | 628.78 (390.71) | 36.7 (22.8) 6.2% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.83 mph (30.31 km/h) |
| 25 mph (40.23 km/h) | 23.54 mph (37.89 km/h) |
| 30 mph (48.28 km/h) | 28.25 mph (45.46 km/h) |
| 35 mph (56.33 km/h) | 32.96 mph (53.04 km/h) |
| 40 mph (64.37 km/h) | 37.67 mph (60.62 km/h) |
| 45 mph (72.42 km/h) | 42.37 mph (68.19 km/h) |
| 50 mph (80.47 km/h) | 47.08 mph (75.77 km/h) |
| 55 mph (88.51 km/h) | 51.79 mph (83.35 km/h) |
| 60 mph (96.56 km/h) | 56.5 mph (90.92 km/h) |
| 65 mph (104.61 km/h) | 61.21 mph (98.5 km/h) |
| 70 mph (112.65 km/h) | 65.91 mph (106.08 km/h) |
| 75 mph (120.7 km/h) | 70.62 mph (113.66 km/h) |
| 80 mph (128.75 km/h) | 75.33 mph (121.23 km/h) |
| 85 mph (136.79 km/h) | 80.04 mph (128.81 km/h) |
| 90 mph (144.84 km/h) | 84.75 mph (136.39 km/h) |
| 95 mph (152.89 km/h) | 89.46 mph (143.96 km/h) |
| 100 mph (160.93 km/h) | 94.16 mph (151.54 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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