Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/75-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 38.01 (965.5) | 35.02 (889.6) | -2.99 (-75.9) -7.9% |
| Width inches (mm) | 12.01 (305) | 12.52 (318) | 0.51 (13) 4.3% |
| Circum. inches (mm) | 119.42 (3033.21) | 110.03 (2794.76) | -9.39 (-238.45) -7.9% |
| Sidewall Height inches (mm) | 9.01 (228.75) | 7.51 (190.8) | -1.49 (-37.95) -16.6% |
| Revolutions per mile (km) | 530.57 (329.68) | 575.84 (357.81) | 45.27 (28.13) 8.5% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.43 mph (29.66 km/h) |
| 25 mph (40.23 km/h) | 23.03 mph (37.07 km/h) |
| 30 mph (48.28 km/h) | 27.64 mph (44.48 km/h) |
| 35 mph (56.33 km/h) | 32.25 mph (51.9 km/h) |
| 40 mph (64.37 km/h) | 36.86 mph (59.31 km/h) |
| 45 mph (72.42 km/h) | 41.46 mph (66.73 km/h) |
| 50 mph (80.47 km/h) | 46.07 mph (74.14 km/h) |
| 55 mph (88.51 km/h) | 50.68 mph (81.56 km/h) |
| 60 mph (96.56 km/h) | 55.28 mph (88.97 km/h) |
| 65 mph (104.61 km/h) | 59.89 mph (96.38 km/h) |
| 70 mph (112.65 km/h) | 64.5 mph (103.8 km/h) |
| 75 mph (120.7 km/h) | 69.1 mph (111.21 km/h) |
| 80 mph (128.75 km/h) | 73.71 mph (118.63 km/h) |
| 85 mph (136.79 km/h) | 78.32 mph (126.04 km/h) |
| 90 mph (144.84 km/h) | 82.92 mph (133.45 km/h) |
| 95 mph (152.89 km/h) | 87.53 mph (140.87 km/h) |
| 100 mph (160.93 km/h) | 92.14 mph (148.28 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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