Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/60-18 | 325/65-18 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.35 (847.2) | 34.63 (879.7) | 1.28 (32.5) 3.8% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 104.79 (2661.56) | 108.81 (2763.66) | 4.02 (102.1) 3.8% |
| Sidewall Height inches (mm) | 7.68 (195) | 8.32 (211.25) | 0.64 (16.25) 8.3% |
| Revolutions per mile (km) | 604.66 (375.72) | 582.32 (361.84) | -22.34 (-13.88) -3.7% |
325/65-18 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.77 mph (33.42 km/h) |
| 25 mph (40.23 km/h) | 25.96 mph (41.78 km/h) |
| 30 mph (48.28 km/h) | 31.15 mph (50.13 km/h) |
| 35 mph (56.33 km/h) | 36.34 mph (58.49 km/h) |
| 40 mph (64.37 km/h) | 41.53 mph (66.84 km/h) |
| 45 mph (72.42 km/h) | 46.73 mph (75.2 km/h) |
| 50 mph (80.47 km/h) | 51.92 mph (83.55 km/h) |
| 55 mph (88.51 km/h) | 57.11 mph (91.91 km/h) |
| 60 mph (96.56 km/h) | 62.3 mph (100.27 km/h) |
| 65 mph (104.61 km/h) | 67.49 mph (108.62 km/h) |
| 70 mph (112.65 km/h) | 72.69 mph (116.98 km/h) |
| 75 mph (120.7 km/h) | 77.88 mph (125.33 km/h) |
| 80 mph (128.75 km/h) | 83.07 mph (133.69 km/h) |
| 85 mph (136.79 km/h) | 88.26 mph (142.04 km/h) |
| 90 mph (144.84 km/h) | 93.45 mph (150.4 km/h) |
| 95 mph (152.89 km/h) | 98.64 mph (158.75 km/h) |
| 100 mph (160.93 km/h) | 103.84 mph (167.11 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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