Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/60-20 | 35/12.5-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 34.41 (874) | 35.02 (889.6) | 0.61 (15.6) 1.8% |
| Width inches (mm) | 12.01 (305) | 12.52 (318) | 0.51 (13) 4.3% |
| Circum. inches (mm) | 108.1 (2745.75) | 110.03 (2794.76) | 1.93 (49.01) 1.8% |
| Sidewall Height inches (mm) | 7.2 (183) | 7.51 (190.8) | 0.31 (7.8) 4.3% |
| Revolutions per mile (km) | 586.12 (364.2) | 575.84 (357.81) | -10.28 (-6.39) -1.8% |
35/12.5-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.36 mph (32.76 km/h) |
| 25 mph (40.23 km/h) | 25.45 mph (40.95 km/h) |
| 30 mph (48.28 km/h) | 30.54 mph (49.14 km/h) |
| 35 mph (56.33 km/h) | 35.62 mph (57.33 km/h) |
| 40 mph (64.37 km/h) | 40.71 mph (65.52 km/h) |
| 45 mph (72.42 km/h) | 45.8 mph (73.71 km/h) |
| 50 mph (80.47 km/h) | 50.89 mph (81.9 km/h) |
| 55 mph (88.51 km/h) | 55.98 mph (90.09 km/h) |
| 60 mph (96.56 km/h) | 61.07 mph (98.28 km/h) |
| 65 mph (104.61 km/h) | 66.16 mph (106.47 km/h) |
| 70 mph (112.65 km/h) | 71.25 mph (114.67 km/h) |
| 75 mph (120.7 km/h) | 76.34 mph (122.86 km/h) |
| 80 mph (128.75 km/h) | 81.43 mph (131.05 km/h) |
| 85 mph (136.79 km/h) | 86.52 mph (139.24 km/h) |
| 90 mph (144.84 km/h) | 91.61 mph (147.43 km/h) |
| 95 mph (152.89 km/h) | 96.7 mph (155.62 km/h) |
| 100 mph (160.93 km/h) | 101.78 mph (163.81 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
