Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/75-18 | 325/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.65 (854.7) | 34.63 (879.7) | 0.98 (25) 2.9% |
| Width inches (mm) | 10.43 (265) | 12.8 (325) | 2.36 (60) 22.6% |
| Circum. inches (mm) | 105.71 (2685.12) | 108.81 (2763.66) | 3.09 (78.54) 2.9% |
| Sidewall Height inches (mm) | 7.82 (198.75) | 8.32 (211.25) | 0.49 (12.5) 6.3% |
| Revolutions per mile (km) | 599.36 (372.42) | 582.32 (361.84) | -17.03 (-10.58) -2.8% |
325/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.59 mph (33.13 km/h) |
| 25 mph (40.23 km/h) | 25.73 mph (41.41 km/h) |
| 30 mph (48.28 km/h) | 30.88 mph (49.69 km/h) |
| 35 mph (56.33 km/h) | 36.02 mph (57.97 km/h) |
| 40 mph (64.37 km/h) | 41.17 mph (66.26 km/h) |
| 45 mph (72.42 km/h) | 46.32 mph (74.54 km/h) |
| 50 mph (80.47 km/h) | 51.46 mph (82.82 km/h) |
| 55 mph (88.51 km/h) | 56.61 mph (91.1 km/h) |
| 60 mph (96.56 km/h) | 61.76 mph (99.39 km/h) |
| 65 mph (104.61 km/h) | 66.9 mph (107.67 km/h) |
| 70 mph (112.65 km/h) | 72.05 mph (115.95 km/h) |
| 75 mph (120.7 km/h) | 77.19 mph (124.23 km/h) |
| 80 mph (128.75 km/h) | 82.34 mph (132.51 km/h) |
| 85 mph (136.79 km/h) | 87.49 mph (140.8 km/h) |
| 90 mph (144.84 km/h) | 92.63 mph (149.08 km/h) |
| 95 mph (152.89 km/h) | 97.78 mph (157.36 km/h) |
| 100 mph (160.93 km/h) | 102.93 mph (165.64 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1482 | 1722 | 1854 | 1936 | 2024 | 2087 | 2157 | 2239 | 2352 | 2466 | 2592 | 2693 | 2876 | 3077 | 3235 | 3336 | 3393 | 3601 | 3891 | 4521 |
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