Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/25-21 | 335/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.4 (695.9) | 27.91 (709) | 0.52 (13.1) 1.9% |
| Width inches (mm) | 12.8 (325) | 13.19 (335) | 0.39 (10) 3.1% |
| Circum. inches (mm) | 86.07 (2186.23) | 87.69 (2227.39) | 1.62 (41.15) 1.9% |
| Sidewall Height inches (mm) | 3.2 (81.25) | 3.96 (100.5) | 0.76 (19.25) 23.7% |
| Revolutions per mile (km) | 736.13 (457.41) | 722.52 (448.96) | -13.6 (-8.45) -1.8% |
335/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.38 mph (32.79 km/h) |
| 25 mph (40.23 km/h) | 25.47 mph (40.99 km/h) |
| 30 mph (48.28 km/h) | 30.56 mph (49.19 km/h) |
| 35 mph (56.33 km/h) | 35.66 mph (57.39 km/h) |
| 40 mph (64.37 km/h) | 40.75 mph (65.59 km/h) |
| 45 mph (72.42 km/h) | 45.85 mph (73.78 km/h) |
| 50 mph (80.47 km/h) | 50.94 mph (81.98 km/h) |
| 55 mph (88.51 km/h) | 56.04 mph (90.18 km/h) |
| 60 mph (96.56 km/h) | 61.13 mph (98.38 km/h) |
| 65 mph (104.61 km/h) | 66.22 mph (106.58 km/h) |
| 70 mph (112.65 km/h) | 71.32 mph (114.77 km/h) |
| 75 mph (120.7 km/h) | 76.41 mph (122.97 km/h) |
| 80 mph (128.75 km/h) | 81.51 mph (131.17 km/h) |
| 85 mph (136.79 km/h) | 86.6 mph (139.37 km/h) |
| 90 mph (144.84 km/h) | 91.69 mph (147.57 km/h) |
| 95 mph (152.89 km/h) | 96.79 mph (155.77 km/h) |
| 100 mph (160.93 km/h) | 101.88 mph (163.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1839 | 2136 | 2300 | 2402 | 2512 | 2590 | 2676 | 2778 | 2918 | 3059 | 3216 | 3341 | 3568 | 3818 | 4014 | 4139 | 4209 | 4468 | 4828 | 5610 |
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