Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/70-20 | 35/11.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 36.81 (935) | 34.94 (887.6) | -1.87 (-47.4) -5.1% |
| Width inches (mm) | 12.01 (305) | 11.5 (292) | -0.51 (-13) -4.3% |
| Circum. inches (mm) | 115.65 (2937.39) | 109.78 (2788.48) | -5.86 (-148.91) -5.1% |
| Sidewall Height inches (mm) | 8.41 (213.5) | 7.47 (189.8) | -0.93 (-23.7) -11.1% |
| Revolutions per mile (km) | 547.88 (340.44) | 577.14 (358.62) | 29.26 (18.18) 5.3% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.99 mph (30.56 km/h) |
| 25 mph (40.23 km/h) | 23.73 mph (38.19 km/h) |
| 30 mph (48.28 km/h) | 28.48 mph (45.83 km/h) |
| 35 mph (56.33 km/h) | 33.23 mph (53.47 km/h) |
| 40 mph (64.37 km/h) | 37.97 mph (61.11 km/h) |
| 45 mph (72.42 km/h) | 42.72 mph (68.75 km/h) |
| 50 mph (80.47 km/h) | 47.47 mph (76.39 km/h) |
| 55 mph (88.51 km/h) | 52.21 mph (84.03 km/h) |
| 60 mph (96.56 km/h) | 56.96 mph (91.67 km/h) |
| 65 mph (104.61 km/h) | 61.7 mph (99.3 km/h) |
| 70 mph (112.65 km/h) | 66.45 mph (106.94 km/h) |
| 75 mph (120.7 km/h) | 71.2 mph (114.58 km/h) |
| 80 mph (128.75 km/h) | 75.94 mph (122.22 km/h) |
| 85 mph (136.79 km/h) | 80.69 mph (129.86 km/h) |
| 90 mph (144.84 km/h) | 85.44 mph (137.5 km/h) |
| 95 mph (152.89 km/h) | 90.18 mph (145.14 km/h) |
| 100 mph (160.93 km/h) | 94.93 mph (152.78 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1469 | 1706 | 1837 | 1919 | 2006 | 2069 | 2137 | 2219 | 2331 | 2444 | 2569 | 2669 | 2850 | 3050 | 3206 | 3306 | 3362 | 3569 | 3856 | 4481 |
Better Fuel Economy Factory Ratios Increased Power
