Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/40-20 | 300/35-20 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 28.66 (728) | 28.27 (718) | -0.39 (-10) -1.4% |
| Width inches (mm) | 10.83 (275) | 11.81 (300) | 0.98 (25) 9.1% |
| Circum. inches (mm) | 90.04 (2287.08) | 88.81 (2255.66) | -1.24 (-31.42) -1.4% |
| Sidewall Height inches (mm) | 4.33 (110) | 4.13 (105) | -0.2 (-5) -4.5% |
| Revolutions per mile (km) | 703.67 (437.24) | 713.47 (443.33) | 9.8 (6.09) 1.4% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.73 mph (31.74 km/h) |
| 25 mph (40.23 km/h) | 24.66 mph (39.68 km/h) |
| 30 mph (48.28 km/h) | 29.59 mph (47.62 km/h) |
| 35 mph (56.33 km/h) | 34.52 mph (55.55 km/h) |
| 40 mph (64.37 km/h) | 39.45 mph (63.49 km/h) |
| 45 mph (72.42 km/h) | 44.38 mph (71.43 km/h) |
| 50 mph (80.47 km/h) | 49.31 mph (79.36 km/h) |
| 55 mph (88.51 km/h) | 54.24 mph (87.3 km/h) |
| 60 mph (96.56 km/h) | 59.18 mph (95.23 km/h) |
| 65 mph (104.61 km/h) | 64.11 mph (103.17 km/h) |
| 70 mph (112.65 km/h) | 69.04 mph (111.11 km/h) |
| 75 mph (120.7 km/h) | 73.97 mph (119.04 km/h) |
| 80 mph (128.75 km/h) | 78.9 mph (126.98 km/h) |
| 85 mph (136.79 km/h) | 83.83 mph (134.92 km/h) |
| 90 mph (144.84 km/h) | 88.76 mph (142.85 km/h) |
| 95 mph (152.89 km/h) | 93.7 mph (150.79 km/h) |
| 100 mph (160.93 km/h) | 98.63 mph (158.72 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1816 | 2109 | 2271 | 2372 | 2480 | 2557 | 2642 | 2743 | 2882 | 3021 | 3175 | 3299 | 3523 | 3770 | 3964 | 4087 | 4157 | 4412 | 4767 | 5540 |
Better Fuel Economy Factory Ratios Increased Power
