Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 345/30-20 | 305/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.15 (715) | 28.41 (721.5) | 0.26 (6.5) 0.9% |
| Width inches (mm) | 13.58 (345) | 12.01 (305) | -1.57 (-40) -11.6% |
| Circum. inches (mm) | 88.43 (2246.24) | 89.24 (2266.66) | 0.8 (20.42) 0.9% |
| Sidewall Height inches (mm) | 4.07 (103.5) | 4.2 (106.75) | 0.13 (3.25) 3.1% |
| Revolutions per mile (km) | 716.46 (445.19) | 710.01 (441.18) | -6.45 (-4.01) -0.9% |
305/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.18 mph (32.48 km/h) |
| 25 mph (40.23 km/h) | 25.23 mph (40.6 km/h) |
| 30 mph (48.28 km/h) | 30.27 mph (48.72 km/h) |
| 35 mph (56.33 km/h) | 35.32 mph (56.84 km/h) |
| 40 mph (64.37 km/h) | 40.36 mph (64.96 km/h) |
| 45 mph (72.42 km/h) | 45.41 mph (73.08 km/h) |
| 50 mph (80.47 km/h) | 50.45 mph (81.2 km/h) |
| 55 mph (88.51 km/h) | 55.5 mph (89.32 km/h) |
| 60 mph (96.56 km/h) | 60.55 mph (97.44 km/h) |
| 65 mph (104.61 km/h) | 65.59 mph (105.56 km/h) |
| 70 mph (112.65 km/h) | 70.64 mph (113.68 km/h) |
| 75 mph (120.7 km/h) | 75.68 mph (121.8 km/h) |
| 80 mph (128.75 km/h) | 80.73 mph (129.92 km/h) |
| 85 mph (136.79 km/h) | 85.77 mph (138.04 km/h) |
| 90 mph (144.84 km/h) | 90.82 mph (146.16 km/h) |
| 95 mph (152.89 km/h) | 95.86 mph (154.28 km/h) |
| 100 mph (160.93 km/h) | 100.91 mph (162.4 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
