Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/80-16 | 335/80-21 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.47 (926.4) | 42.1 (1069.4) | 5.63 (143) 15.4% |
| Width inches (mm) | 12.8 (325) | 13.19 (335) | 0.39 (10) 3.1% |
| Circum. inches (mm) | 114.58 (2910.37) | 132.27 (3359.62) | 17.69 (449.25) 15.4% |
| Sidewall Height inches (mm) | 10.24 (260) | 10.55 (268) | 0.31 (8) 3.1% |
| Revolutions per mile (km) | 552.97 (343.6) | 479.03 (297.65) | -73.94 (-45.95) -13.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 23.09 mph (37.16 km/h) |
| 25 mph (40.23 km/h) | 28.86 mph (46.44 km/h) |
| 30 mph (48.28 km/h) | 34.63 mph (55.73 km/h) |
| 35 mph (56.33 km/h) | 40.4 mph (65.02 km/h) |
| 40 mph (64.37 km/h) | 46.17 mph (74.31 km/h) |
| 45 mph (72.42 km/h) | 51.95 mph (83.6 km/h) |
| 50 mph (80.47 km/h) | 57.72 mph (92.89 km/h) |
| 55 mph (88.51 km/h) | 63.49 mph (102.18 km/h) |
| 60 mph (96.56 km/h) | 69.26 mph (111.47 km/h) |
| 65 mph (104.61 km/h) | 75.03 mph (120.75 km/h) |
| 70 mph (112.65 km/h) | 80.81 mph (130.04 km/h) |
| 75 mph (120.7 km/h) | 86.58 mph (139.33 km/h) |
| 80 mph (128.75 km/h) | 92.35 mph (148.62 km/h) |
| 85 mph (136.79 km/h) | 98.12 mph (157.91 km/h) |
| 90 mph (144.84 km/h) | 103.89 mph (167.2 km/h) |
| 95 mph (152.89 km/h) | 109.66 mph (176.49 km/h) |
| 100 mph (160.93 km/h) | 115.44 mph (185.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1219 | 1416 | 1525 | 1593 | 1665 | 1717 | 1774 | 1842 | 1935 | 2028 | 2132 | 2215 | 2365 | 2531 | 2661 | 2744 | 2791 | 2962 | 3201 | 3719 |
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