Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/65-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 35.61 (904.5) | 35.02 (889.6) | -0.59 (-14.9) -1.6% |
| Width inches (mm) | 12.01 (305) | 12.52 (318) | 0.51 (13) 4.3% |
| Circum. inches (mm) | 111.87 (2841.57) | 110.03 (2794.76) | -1.84 (-46.81) -1.6% |
| Sidewall Height inches (mm) | 7.81 (198.25) | 7.51 (190.8) | -0.29 (-7.45) -3.8% |
| Revolutions per mile (km) | 566.36 (351.92) | 575.84 (357.81) | 9.49 (5.89) 1.7% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.67 mph (31.66 km/h) |
| 25 mph (40.23 km/h) | 24.59 mph (39.57 km/h) |
| 30 mph (48.28 km/h) | 29.51 mph (47.49 km/h) |
| 35 mph (56.33 km/h) | 34.42 mph (55.4 km/h) |
| 40 mph (64.37 km/h) | 39.34 mph (63.31 km/h) |
| 45 mph (72.42 km/h) | 44.26 mph (71.23 km/h) |
| 50 mph (80.47 km/h) | 49.18 mph (79.14 km/h) |
| 55 mph (88.51 km/h) | 54.09 mph (87.06 km/h) |
| 60 mph (96.56 km/h) | 59.01 mph (94.97 km/h) |
| 65 mph (104.61 km/h) | 63.93 mph (102.88 km/h) |
| 70 mph (112.65 km/h) | 68.85 mph (110.8 km/h) |
| 75 mph (120.7 km/h) | 73.76 mph (118.71 km/h) |
| 80 mph (128.75 km/h) | 78.68 mph (126.63 km/h) |
| 85 mph (136.79 km/h) | 83.6 mph (134.54 km/h) |
| 90 mph (144.84 km/h) | 88.52 mph (142.46 km/h) |
| 95 mph (152.89 km/h) | 93.44 mph (150.37 km/h) |
| 100 mph (160.93 km/h) | 98.35 mph (158.28 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 |
Better Fuel Economy Factory Ratios Increased Power
