Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-20 | 305/35-19 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.2 (691) | 27.41 (696.1) | 0.2 (5.1) 0.7% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 85.47 (2170.84) | 86.1 (2186.86) | 0.63 (16.02) 0.7% |
| Sidewall Height inches (mm) | 3.6 (91.5) | 4.2 (106.75) | 0.6 (15.25) 16.7% |
| Revolutions per mile (km) | 741.35 (460.65) | 735.91 (457.28) | -5.43 (-3.37) -0.7% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.15 mph (32.42 km/h) |
| 25 mph (40.23 km/h) | 25.18 mph (40.53 km/h) |
| 30 mph (48.28 km/h) | 30.22 mph (48.64 km/h) |
| 35 mph (56.33 km/h) | 35.26 mph (56.74 km/h) |
| 40 mph (64.37 km/h) | 40.3 mph (64.85 km/h) |
| 45 mph (72.42 km/h) | 45.33 mph (72.96 km/h) |
| 50 mph (80.47 km/h) | 50.37 mph (81.06 km/h) |
| 55 mph (88.51 km/h) | 55.41 mph (89.17 km/h) |
| 60 mph (96.56 km/h) | 60.44 mph (97.27 km/h) |
| 65 mph (104.61 km/h) | 65.48 mph (105.38 km/h) |
| 70 mph (112.65 km/h) | 70.52 mph (113.49 km/h) |
| 75 mph (120.7 km/h) | 75.55 mph (121.59 km/h) |
| 80 mph (128.75 km/h) | 80.59 mph (129.7 km/h) |
| 85 mph (136.79 km/h) | 85.63 mph (137.8 km/h) |
| 90 mph (144.84 km/h) | 90.66 mph (145.91 km/h) |
| 95 mph (152.89 km/h) | 95.7 mph (154.02 km/h) |
| 100 mph (160.93 km/h) | 100.74 mph (162.12 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1873 | 2176 | 2343 | 2447 | 2558 | 2638 | 2725 | 2829 | 2973 | 3116 | 3275 | 3403 | 3634 | 3889 | 4088 | 4216 | 4287 | 4550 | 4917 | 5714 |
Better Fuel Economy Factory Ratios Increased Power
