Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 255/50-20 | 305/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 30.04 (763) | 28.41 (721.5) | -1.63 (-41.5) -5.4% |
| Width inches (mm) | 10.04 (255) | 12.01 (305) | 1.97 (50) 19.6% |
| Circum. inches (mm) | 94.37 (2397.04) | 89.24 (2266.66) | -5.13 (-130.38) -5.4% |
| Sidewall Height inches (mm) | 5.02 (127.5) | 4.2 (106.75) | -0.82 (-20.75) -16.3% |
| Revolutions per mile (km) | 671.39 (417.18) | 710.01 (441.18) | 38.62 (24) 5.8% |
305/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.91 mph (30.44 km/h) |
| 25 mph (40.23 km/h) | 23.64 mph (38.05 km/h) |
| 30 mph (48.28 km/h) | 28.37 mph (45.65 km/h) |
| 35 mph (56.33 km/h) | 33.1 mph (53.26 km/h) |
| 40 mph (64.37 km/h) | 37.82 mph (60.87 km/h) |
| 45 mph (72.42 km/h) | 42.55 mph (68.48 km/h) |
| 50 mph (80.47 km/h) | 47.28 mph (76.09 km/h) |
| 55 mph (88.51 km/h) | 52.01 mph (83.7 km/h) |
| 60 mph (96.56 km/h) | 56.74 mph (91.31 km/h) |
| 65 mph (104.61 km/h) | 61.46 mph (98.92 km/h) |
| 70 mph (112.65 km/h) | 66.19 mph (106.53 km/h) |
| 75 mph (120.7 km/h) | 70.92 mph (114.14 km/h) |
| 80 mph (128.75 km/h) | 75.65 mph (121.75 km/h) |
| 85 mph (136.79 km/h) | 80.38 mph (129.35 km/h) |
| 90 mph (144.84 km/h) | 85.1 mph (136.96 km/h) |
| 95 mph (152.89 km/h) | 89.83 mph (144.57 km/h) |
| 100 mph (160.93 km/h) | 94.56 mph (152.18 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1807 | 2099 | 2260 | 2360 | 2468 | 2545 | 2630 | 2729 | 2868 | 3006 | 3160 | 3283 | 3506 | 3752 | 3944 | 4067 | 4136 | 4390 | 4744 | 5513 |
Better Fuel Economy Factory Ratios Increased Power
