Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-18 | 275/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.35 (847.2) | 32.07 (814.7) | -1.28 (-32.5) -3.8% |
| Width inches (mm) | 12.8 (325) | 10.83 (275) | -1.97 (-50) -15.4% |
| Circum. inches (mm) | 104.79 (2661.56) | 100.77 (2559.46) | -4.02 (-102.1) -3.8% |
| Sidewall Height inches (mm) | 7.68 (195) | 7.04 (178.75) | -0.64 (-16.25) -8.3% |
| Revolutions per mile (km) | 604.66 (375.72) | 628.78 (390.71) | 24.12 (14.99) 4% |
275/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.23 mph (30.95 km/h) |
| 25 mph (40.23 km/h) | 24.04 mph (38.69 km/h) |
| 30 mph (48.28 km/h) | 28.85 mph (46.43 km/h) |
| 35 mph (56.33 km/h) | 33.66 mph (54.17 km/h) |
| 40 mph (64.37 km/h) | 38.47 mph (61.9 km/h) |
| 45 mph (72.42 km/h) | 43.27 mph (69.64 km/h) |
| 50 mph (80.47 km/h) | 48.08 mph (77.38 km/h) |
| 55 mph (88.51 km/h) | 52.89 mph (85.12 km/h) |
| 60 mph (96.56 km/h) | 57.7 mph (92.86 km/h) |
| 65 mph (104.61 km/h) | 62.51 mph (100.59 km/h) |
| 70 mph (112.65 km/h) | 67.31 mph (108.33 km/h) |
| 75 mph (120.7 km/h) | 72.12 mph (116.07 km/h) |
| 80 mph (128.75 km/h) | 76.93 mph (123.81 km/h) |
| 85 mph (136.79 km/h) | 81.74 mph (131.55 km/h) |
| 90 mph (144.84 km/h) | 86.55 mph (139.28 km/h) |
| 95 mph (152.89 km/h) | 91.36 mph (147.02 km/h) |
| 100 mph (160.93 km/h) | 96.16 mph (154.76 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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