Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-15 | 325/85-16 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.47 (901) | 37.75 (958.9) | 2.28 (57.9) 6.4% |
| Width inches (mm) | 12.8 (325) | 12.8 (325) | 0 (0) 0% |
| Circum. inches (mm) | 111.44 (2830.57) | 118.6 (3012.47) | 7.16 (181.9) 6.4% |
| Sidewall Height inches (mm) | 10.24 (260) | 10.88 (276.25) | 0.64 (16.25) 6.3% |
| Revolutions per mile (km) | 568.56 (353.28) | 534.23 (331.95) | -34.33 (-21.33) -6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.29 mph (34.26 km/h) |
| 25 mph (40.23 km/h) | 26.61 mph (42.82 km/h) |
| 30 mph (48.28 km/h) | 31.93 mph (51.38 km/h) |
| 35 mph (56.33 km/h) | 37.25 mph (59.95 km/h) |
| 40 mph (64.37 km/h) | 42.57 mph (68.51 km/h) |
| 45 mph (72.42 km/h) | 47.89 mph (77.07 km/h) |
| 50 mph (80.47 km/h) | 53.21 mph (85.64 km/h) |
| 55 mph (88.51 km/h) | 58.53 mph (94.2 km/h) |
| 60 mph (96.56 km/h) | 63.86 mph (102.77 km/h) |
| 65 mph (104.61 km/h) | 69.18 mph (111.33 km/h) |
| 70 mph (112.65 km/h) | 74.5 mph (119.89 km/h) |
| 75 mph (120.7 km/h) | 79.82 mph (128.46 km/h) |
| 80 mph (128.75 km/h) | 85.14 mph (137.02 km/h) |
| 85 mph (136.79 km/h) | 90.46 mph (145.59 km/h) |
| 90 mph (144.84 km/h) | 95.78 mph (154.15 km/h) |
| 95 mph (152.89 km/h) | 101.1 mph (162.71 km/h) |
| 100 mph (160.93 km/h) | 106.43 mph (171.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1360 | 1579 | 1701 | 1776 | 1857 | 1915 | 1979 | 2054 | 2158 | 2262 | 2378 | 2470 | 2638 | 2823 | 2968 | 3060 | 3112 | 3303 | 3569 | 4148 |
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