Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 225/65-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 29.52 (749.7) | 32.07 (814.7) | 2.56 (65) 8.7% |
| Width inches (mm) | 8.86 (225) | 10.83 (275) | 1.97 (50) 22.2% |
| Circum. inches (mm) | 92.73 (2355.25) | 100.77 (2559.46) | 8.04 (204.2) 8.7% |
| Sidewall Height inches (mm) | 5.76 (146.25) | 7.04 (178.75) | 1.28 (32.5) 22.2% |
| Revolutions per mile (km) | 683.3 (424.58) | 628.78 (390.71) | -54.52 (-33.87) -8% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.73 mph (34.98 km/h) |
| 25 mph (40.23 km/h) | 27.17 mph (43.72 km/h) |
| 30 mph (48.28 km/h) | 32.6 mph (52.47 km/h) |
| 35 mph (56.33 km/h) | 38.03 mph (61.21 km/h) |
| 40 mph (64.37 km/h) | 43.47 mph (69.96 km/h) |
| 45 mph (72.42 km/h) | 48.9 mph (78.7 km/h) |
| 50 mph (80.47 km/h) | 54.34 mph (87.44 km/h) |
| 55 mph (88.51 km/h) | 59.77 mph (96.19 km/h) |
| 60 mph (96.56 km/h) | 65.2 mph (104.93 km/h) |
| 65 mph (104.61 km/h) | 70.64 mph (113.68 km/h) |
| 70 mph (112.65 km/h) | 76.07 mph (122.42 km/h) |
| 75 mph (120.7 km/h) | 81.5 mph (131.17 km/h) |
| 80 mph (128.75 km/h) | 86.94 mph (139.91 km/h) |
| 85 mph (136.79 km/h) | 92.37 mph (148.65 km/h) |
| 90 mph (144.84 km/h) | 97.8 mph (157.4 km/h) |
| 95 mph (152.89 km/h) | 103.24 mph (166.14 km/h) |
| 100 mph (160.93 km/h) | 108.67 mph (174.89 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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