Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/50-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 32.01 (813) | 35.02 (889.6) | 3.02 (76.6) 9.4% |
| Width inches (mm) | 12.01 (305) | 12.52 (318) | 0.51 (13) 4.3% |
| Circum. inches (mm) | 100.56 (2554.11) | 110.03 (2794.76) | 9.47 (240.65) 9.4% |
| Sidewall Height inches (mm) | 6 (152.5) | 7.51 (190.8) | 1.51 (38.3) 25.1% |
| Revolutions per mile (km) | 630.1 (391.52) | 575.84 (357.81) | -54.26 (-33.71) -8.6% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 21.88 mph (35.22 km/h) |
| 25 mph (40.23 km/h) | 27.36 mph (44.02 km/h) |
| 30 mph (48.28 km/h) | 32.83 mph (52.83 km/h) |
| 35 mph (56.33 km/h) | 38.3 mph (61.63 km/h) |
| 40 mph (64.37 km/h) | 43.77 mph (70.44 km/h) |
| 45 mph (72.42 km/h) | 49.24 mph (79.24 km/h) |
| 50 mph (80.47 km/h) | 54.71 mph (88.05 km/h) |
| 55 mph (88.51 km/h) | 60.18 mph (96.85 km/h) |
| 60 mph (96.56 km/h) | 65.65 mph (105.66 km/h) |
| 65 mph (104.61 km/h) | 71.12 mph (114.46 km/h) |
| 70 mph (112.65 km/h) | 76.6 mph (123.27 km/h) |
| 75 mph (120.7 km/h) | 82.07 mph (132.07 km/h) |
| 80 mph (128.75 km/h) | 87.54 mph (140.88 km/h) |
| 85 mph (136.79 km/h) | 93.01 mph (149.68 km/h) |
| 90 mph (144.84 km/h) | 98.48 mph (158.49 km/h) |
| 95 mph (152.89 km/h) | 103.95 mph (167.29 km/h) |
| 100 mph (160.93 km/h) | 109.42 mph (176.1 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
