Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/70-18 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.81 (884.2) | 35.02 (889.6) | 0.21 (5.4) 0.6% |
| Width inches (mm) | 12.01 (305) | 12.52 (318) | 0.51 (13) 4.3% |
| Circum. inches (mm) | 109.36 (2777.8) | 110.03 (2794.76) | 0.67 (16.96) 0.6% |
| Sidewall Height inches (mm) | 8.41 (213.5) | 7.51 (190.8) | -0.89 (-22.7) -10.6% |
| Revolutions per mile (km) | 579.36 (360) | 575.84 (357.81) | -3.52 (-2.19) -0.6% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.12 mph (32.38 km/h) |
| 25 mph (40.23 km/h) | 25.15 mph (40.48 km/h) |
| 30 mph (48.28 km/h) | 30.18 mph (48.58 km/h) |
| 35 mph (56.33 km/h) | 35.21 mph (56.67 km/h) |
| 40 mph (64.37 km/h) | 40.24 mph (64.77 km/h) |
| 45 mph (72.42 km/h) | 45.27 mph (72.86 km/h) |
| 50 mph (80.47 km/h) | 50.31 mph (80.96 km/h) |
| 55 mph (88.51 km/h) | 55.34 mph (89.05 km/h) |
| 60 mph (96.56 km/h) | 60.37 mph (97.15 km/h) |
| 65 mph (104.61 km/h) | 65.4 mph (105.25 km/h) |
| 70 mph (112.65 km/h) | 70.43 mph (113.34 km/h) |
| 75 mph (120.7 km/h) | 75.46 mph (121.44 km/h) |
| 80 mph (128.75 km/h) | 80.49 mph (129.53 km/h) |
| 85 mph (136.79 km/h) | 85.52 mph (137.63 km/h) |
| 90 mph (144.84 km/h) | 90.55 mph (145.73 km/h) |
| 95 mph (152.89 km/h) | 95.58 mph (153.82 km/h) |
| 100 mph (160.93 km/h) | 100.61 mph (161.92 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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