Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 305/30-20 | 305/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.2 (691) | 28.41 (721.5) | 1.2 (30.5) 4.4% |
| Width inches (mm) | 12.01 (305) | 12.01 (305) | 0 (0) 0% |
| Circum. inches (mm) | 85.47 (2170.84) | 89.24 (2266.66) | 3.77 (95.82) 4.4% |
| 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) | 710.01 (441.18) | -31.34 (-19.47) -4.2% |
305/35-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 20.88 mph (33.61 km/h) |
| 25 mph (40.23 km/h) | 26.1 mph (42.01 km/h) |
| 30 mph (48.28 km/h) | 31.32 mph (50.41 km/h) |
| 35 mph (56.33 km/h) | 36.54 mph (58.81 km/h) |
| 40 mph (64.37 km/h) | 41.77 mph (67.22 km/h) |
| 45 mph (72.42 km/h) | 46.99 mph (75.62 km/h) |
| 50 mph (80.47 km/h) | 52.21 mph (84.02 km/h) |
| 55 mph (88.51 km/h) | 57.43 mph (92.42 km/h) |
| 60 mph (96.56 km/h) | 62.65 mph (100.82 km/h) |
| 65 mph (104.61 km/h) | 67.87 mph (109.22 km/h) |
| 70 mph (112.65 km/h) | 73.09 mph (117.63 km/h) |
| 75 mph (120.7 km/h) | 78.31 mph (126.03 km/h) |
| 80 mph (128.75 km/h) | 83.53 mph (134.43 km/h) |
| 85 mph (136.79 km/h) | 88.75 mph (142.83 km/h) |
| 90 mph (144.84 km/h) | 93.97 mph (151.23 km/h) |
| 95 mph (152.89 km/h) | 99.19 mph (159.64 km/h) |
| 100 mph (160.93 km/h) | 104.41 mph (168.04 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
