Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 285/55-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.34 (821.5) | 35.02 (889.6) | 2.68 (68.1) 8.3% |
| Width inches (mm) | 11.22 (285) | 12.52 (318) | 1.3 (33) 11.6% |
| Circum. inches (mm) | 101.61 (2580.82) | 110.03 (2794.76) | 8.42 (213.94) 8.3% |
| Sidewall Height inches (mm) | 6.17 (156.75) | 7.51 (190.8) | 1.34 (34.05) 21.7% |
| Revolutions per mile (km) | 623.58 (387.47) | 575.84 (357.81) | -47.74 (-29.66) -7.7% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.66 mph (34.86 km/h) |
| 25 mph (40.23 km/h) | 27.07 mph (43.57 km/h) |
| 30 mph (48.28 km/h) | 32.49 mph (52.28 km/h) |
| 35 mph (56.33 km/h) | 37.9 mph (61 km/h) |
| 40 mph (64.37 km/h) | 43.32 mph (69.71 km/h) |
| 45 mph (72.42 km/h) | 48.73 mph (78.42 km/h) |
| 50 mph (80.47 km/h) | 54.14 mph (87.14 km/h) |
| 55 mph (88.51 km/h) | 59.56 mph (95.85 km/h) |
| 60 mph (96.56 km/h) | 64.97 mph (104.57 km/h) |
| 65 mph (104.61 km/h) | 70.39 mph (113.28 km/h) |
| 70 mph (112.65 km/h) | 75.8 mph (121.99 km/h) |
| 75 mph (120.7 km/h) | 81.22 mph (130.71 km/h) |
| 80 mph (128.75 km/h) | 86.63 mph (139.42 km/h) |
| 85 mph (136.79 km/h) | 92.05 mph (148.13 km/h) |
| 90 mph (144.84 km/h) | 97.46 mph (156.85 km/h) |
| 95 mph (152.89 km/h) | 102.88 mph (165.56 km/h) |
| 100 mph (160.93 km/h) | 108.29 mph (174.28 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1465 | 1702 | 1833 | 1914 | 2002 | 2064 | 2133 | 2214 | 2326 | 2438 | 2563 | 2663 | 2844 | 3043 | 3199 | 3299 | 3355 | 3561 | 3847 | 4471 |
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