Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 265/35-20 | 305/30-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 27.3 (693.5) | 27.2 (691) | -0.1 (-2.5) -0.4% |
| Width inches (mm) | 10.43 (265) | 12.01 (305) | 1.57 (40) 15.1% |
| Circum. inches (mm) | 85.78 (2178.69) | 85.47 (2170.84) | -0.31 (-7.85) -0.4% |
| Sidewall Height inches (mm) | 3.65 (92.75) | 3.6 (91.5) | -0.05 (-1.25) -1.3% |
| Revolutions per mile (km) | 738.67 (458.99) | 741.35 (460.65) | 2.67 (1.66) 0.4% |
305/30-20 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.93 mph (32.07 km/h) |
| 25 mph (40.23 km/h) | 24.91 mph (40.09 km/h) |
| 30 mph (48.28 km/h) | 29.89 mph (48.11 km/h) |
| 35 mph (56.33 km/h) | 34.87 mph (56.12 km/h) |
| 40 mph (64.37 km/h) | 39.86 mph (64.14 km/h) |
| 45 mph (72.42 km/h) | 44.84 mph (72.16 km/h) |
| 50 mph (80.47 km/h) | 49.82 mph (80.18 km/h) |
| 55 mph (88.51 km/h) | 54.8 mph (88.2 km/h) |
| 60 mph (96.56 km/h) | 59.78 mph (96.21 km/h) |
| 65 mph (104.61 km/h) | 64.77 mph (104.23 km/h) |
| 70 mph (112.65 km/h) | 69.75 mph (112.25 km/h) |
| 75 mph (120.7 km/h) | 74.73 mph (120.27 km/h) |
| 80 mph (128.75 km/h) | 79.71 mph (128.28 km/h) |
| 85 mph (136.79 km/h) | 84.69 mph (136.3 km/h) |
| 90 mph (144.84 km/h) | 89.68 mph (144.32 km/h) |
| 95 mph (152.89 km/h) | 94.66 mph (152.34 km/h) |
| 100 mph (160.93 km/h) | 99.64 mph (160.35 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1887 | 2192 | 2360 | 2465 | 2577 | 2657 | 2746 | 2850 | 2994 | 3139 | 3300 | 3428 | 3661 | 3918 | 4118 | 4247 | 4319 | 4584 | 4953 | 5756 |
Better Fuel Economy Factory Ratios Increased Power
