Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/45-22 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.81 (833.3) | 32.07 (814.7) | -0.73 (-18.6) -2.2% |
| Width inches (mm) | 12.01 (305) | 10.83 (275) | -1.18 (-30) -9.8% |
| Circum. inches (mm) | 103.07 (2617.89) | 100.77 (2559.46) | -2.3 (-58.43) -2.2% |
| Sidewall Height inches (mm) | 5.4 (137.25) | 7.04 (178.75) | 1.63 (41.5) 30.2% |
| Revolutions per mile (km) | 614.75 (381.99) | 628.78 (390.71) | 14.04 (8.72) 2.3% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.55 mph (31.47 km/h) |
| 25 mph (40.23 km/h) | 24.44 mph (39.34 km/h) |
| 30 mph (48.28 km/h) | 29.33 mph (47.2 km/h) |
| 35 mph (56.33 km/h) | 34.22 mph (55.07 km/h) |
| 40 mph (64.37 km/h) | 39.11 mph (62.94 km/h) |
| 45 mph (72.42 km/h) | 44 mph (70.8 km/h) |
| 50 mph (80.47 km/h) | 48.88 mph (78.67 km/h) |
| 55 mph (88.51 km/h) | 53.77 mph (86.54 km/h) |
| 60 mph (96.56 km/h) | 58.66 mph (94.41 km/h) |
| 65 mph (104.61 km/h) | 63.55 mph (102.27 km/h) |
| 70 mph (112.65 km/h) | 68.44 mph (110.14 km/h) |
| 75 mph (120.7 km/h) | 73.33 mph (118.01 km/h) |
| 80 mph (128.75 km/h) | 78.21 mph (125.87 km/h) |
| 85 mph (136.79 km/h) | 83.1 mph (133.74 km/h) |
| 90 mph (144.84 km/h) | 87.99 mph (141.61 km/h) |
| 95 mph (152.89 km/h) | 92.88 mph (149.48 km/h) |
| 100 mph (160.93 km/h) | 97.77 mph (157.34 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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