Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 325/30-20 | 285/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.68 (703) | 27.85 (707.5) | 0.18 (4.5) 0.6% |
| Width inches (mm) | 12.8 (325) | 11.22 (285) | -1.57 (-40) -12.3% |
| Circum. inches (mm) | 86.95 (2208.54) | 87.51 (2222.68) | 0.56 (14.14) 0.6% |
| Sidewall Height inches (mm) | 3.84 (97.5) | 3.93 (99.75) | 0.09 (2.25) 2.3% |
| Revolutions per mile (km) | 728.69 (452.79) | 724.06 (449.91) | -4.63 (-2.88) -0.6% |
285/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.13 mph (32.39 km/h) |
| 25 mph (40.23 km/h) | 25.16 mph (40.49 km/h) |
| 30 mph (48.28 km/h) | 30.19 mph (48.59 km/h) |
| 35 mph (56.33 km/h) | 35.22 mph (56.69 km/h) |
| 40 mph (64.37 km/h) | 40.26 mph (64.79 km/h) |
| 45 mph (72.42 km/h) | 45.29 mph (72.88 km/h) |
| 50 mph (80.47 km/h) | 50.32 mph (80.98 km/h) |
| 55 mph (88.51 km/h) | 55.35 mph (89.08 km/h) |
| 60 mph (96.56 km/h) | 60.38 mph (97.18 km/h) |
| 65 mph (104.61 km/h) | 65.42 mph (105.28 km/h) |
| 70 mph (112.65 km/h) | 70.45 mph (113.38 km/h) |
| 75 mph (120.7 km/h) | 75.48 mph (121.47 km/h) |
| 80 mph (128.75 km/h) | 80.51 mph (129.57 km/h) |
| 85 mph (136.79 km/h) | 85.54 mph (137.67 km/h) |
| 90 mph (144.84 km/h) | 90.58 mph (145.77 km/h) |
| 95 mph (152.89 km/h) | 95.61 mph (153.87 km/h) |
| 100 mph (160.93 km/h) | 100.64 mph (161.96 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1843 | 2141 | 2305 | 2407 | 2517 | 2595 | 2682 | 2783 | 2925 | 3066 | 3223 | 3348 | 3575 | 3826 | 4022 | 4148 | 4218 | 4477 | 4838 | 5622 |
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